diff --git a/frontend/mobile-app/lib/features/pre_planting/presentation/pages/pre_planting_position_page.dart b/frontend/mobile-app/lib/features/pre_planting/presentation/pages/pre_planting_position_page.dart
index 037dd47c..05f3640b 100644
--- a/frontend/mobile-app/lib/features/pre_planting/presentation/pages/pre_planting_position_page.dart
+++ b/frontend/mobile-app/lib/features/pre_planting/presentation/pages/pre_planting_position_page.dart
@@ -1,16 +1,825 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:go_router/go_router.dart';
+import '../../../../core/di/injection_container.dart';
+import '../../../../core/services/pre_planting_service.dart';
+import '../../../../routes/route_paths.dart';
 
-/// [2026-02-17] 预种持仓页面（占位 - 待完整实现）
+// ============================================
+// [2026-02-17] 预种持仓页面
+// ============================================
+//
+// 显示用户的预种计划持仓信息，包括：
+// - 持仓概览卡片：累计份数、待合并份数、已合成树数
+// - 合并进度条：当前 N/5 份的进度可视化
+// - 订单列表：所有预种订单记录（按时间倒序）
+// - 合并记录列表：已完成合并的树记录（可点击查看详情/签约）
+//
+// === 页面结构 ===
+// ┌─ Header（顶部导航）
+// ├─ Position Summary（持仓概览 + 进度条）
+// ├─ Tab: 预种订单 / 合并记录
+// └─ ListView（订单或合并记录卡片列表）
+//
+// === 与购买页面的关系 ===
+// 本页面纯展示，不含购买操作。
+// 购买入口在 Profile 页面或本页顶部按钮跳转到 PrePlantingPurchasePage。
+
+/// 预种持仓页面
 ///
-/// 功能：显示累计份数、合并进度条（N/5）、已合成树数、订单列表
-class PrePlantingPositionPage extends StatelessWidget {
+/// 展示用户的预种持仓概览、合并进度、订单列表和合并记录。
+class PrePlantingPositionPage extends ConsumerStatefulWidget {
   const PrePlantingPositionPage({super.key});
 
+  @override
+  ConsumerState<PrePlantingPositionPage> createState() =>
+      _PrePlantingPositionPageState();
+}
+
+class _PrePlantingPositionPageState
+    extends ConsumerState<PrePlantingPositionPage>
+    with SingleTickerProviderStateMixin {
+  // === 常量 ===
+  static const int _portionsPerTree = 5;
+
+  // === 状态 ===
+
+  /// 持仓信息
+  PrePlantingPosition? _position;
+
+  /// 预种订单列表
+  List<PrePlantingOrder> _orders = [];
+
+  /// 合并记录列表
+  List<PrePlantingMerge> _merges = [];
+
+  /// 是否正在加载
+  bool _isLoading = true;
+
+  /// 加载错误信息
+  String? _errorMessage;
+
+  /// Tab 控制器（订单 / 合并记录）
+  late TabController _tabController;
+
+  @override
+  void initState() {
+    super.initState();
+    _tabController = TabController(length: 2, vsync: this);
+    _loadData();
+  }
+
+  @override
+  void dispose() {
+    _tabController.dispose();
+    super.dispose();
+  }
+
+  // ============================================
+  // 数据加载
+  // ============================================
+
+  /// 并行加载持仓、订单、合并记录
+  Future<void> _loadData() async {
+    setState(() {
+      _isLoading = true;
+      _errorMessage = null;
+    });
+
+    try {
+      final service = ref.read(prePlantingServiceProvider);
+
+      final results = await Future.wait([
+        service.getMyPosition().catchError((_) => PrePlantingPosition(
+              totalPortions: 0,
+              availablePortions: 0,
+              mergedPortions: 0,
+              totalTreesMerged: 0,
+            )),
+        service.getMyOrders(),
+        service.getMyMerges(),
+      ]);
+
+      setState(() {
+        _position = results[0] as PrePlantingPosition;
+        _orders = results[1] as List<PrePlantingOrder>;
+        _merges = results[2] as List<PrePlantingMerge>;
+        _isLoading = false;
+      });
+    } catch (e) {
+      debugPrint('[PrePlantingPosition] 加载数据失败: $e');
+      setState(() {
+        _isLoading = false;
+        _errorMessage = '加载数据失败，请重试';
+      });
+    }
+  }
+
+  /// 返回上一页
+  void _goBack() {
+    context.pop();
+  }
+
+  /// 跳转到购买页面
+  void _goToPurchase() {
+    context.push(RoutePaths.prePlantingPurchase);
+  }
+
+  /// 跳转到合并详情页
+  void _goToMergeDetail(String mergeNo) {
+    context.push('${RoutePaths.prePlantingMergeDetail}/$mergeNo');
+  }
+
+  // ============================================
+  // UI 构建
+  // ============================================
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(title: const Text('预种持仓')),
-      body: const Center(child: Text('预种持仓页 - 开发中')),
+      body: Container(
+        width: double.infinity,
+        height: double.infinity,
+        decoration: const BoxDecoration(
+          gradient: LinearGradient(
+            begin: Alignment.topCenter,
+            end: Alignment.bottomCenter,
+            colors: [Color(0xFFFFF7E6), Color(0xFFEAE0C8)],
+          ),
+        ),
+        child: SafeArea(
+          child: Column(
+            children: [
+              _buildHeader(),
+              Expanded(
+                child: _isLoading
+                    ? _buildLoadingState()
+                    : _errorMessage != null
+                        ? _buildErrorState()
+                        : _buildContent(),
+              ),
+            ],
+          ),
+        ),
+      ),
     );
   }
+
+  /// 顶部导航栏
+  Widget _buildHeader() {
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+      decoration: BoxDecoration(
+        color: const Color(0xFFFFF7E6).withValues(alpha: 0.8),
+      ),
+      child: Row(
+        children: [
+          GestureDetector(
+            onTap: _goBack,
+            child: Container(
+              width: 32,
+              height: 32,
+              alignment: Alignment.center,
+              child: const Icon(
+                Icons.arrow_back_ios,
+                color: Color(0xFFD4AF37),
+                size: 20,
+              ),
+            ),
+          ),
+          const SizedBox(width: 4),
+          GestureDetector(
+            onTap: _goBack,
+            child: const Text(
+              '返回',
+              style: TextStyle(
+                fontSize: 16,
+                fontFamily: 'Inter',
+                height: 1.5,
+                color: Color(0xFFD4AF37),
+              ),
+            ),
+          ),
+          const SizedBox(width: 42),
+          const Expanded(
+            child: Text(
+              '预种持仓',
+              style: TextStyle(
+                fontSize: 18,
+                fontFamily: 'Inter',
+                fontWeight: FontWeight.w700,
+                height: 1.25,
+                letterSpacing: -0.27,
+                color: Color(0xFF5D4037),
+              ),
+            ),
+          ),
+          // 购买按钮
+          GestureDetector(
+            onTap: _goToPurchase,
+            child: Container(
+              padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
+              decoration: BoxDecoration(
+                color: const Color(0xFFD4AF37),
+                borderRadius: BorderRadius.circular(16),
+              ),
+              child: const Text(
+                '购买',
+                style: TextStyle(
+                  fontSize: 14,
+                  fontWeight: FontWeight.w600,
+                  color: Colors.white,
+                ),
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  /// 加载中状态
+  Widget _buildLoadingState() {
+    return const Center(
+      child: CircularProgressIndicator(
+        strokeWidth: 2,
+        color: Color(0xFFD4AF37),
+      ),
+    );
+  }
+
+  /// 错误状态
+  Widget _buildErrorState() {
+    return Center(
+      child: GestureDetector(
+        onTap: _loadData,
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            const Icon(Icons.error_outline, color: Color(0xFFE65100), size: 48),
+            const SizedBox(height: 16),
+            Text(
+              _errorMessage!,
+              style: const TextStyle(fontSize: 16, color: Color(0xFFE65100)),
+            ),
+            const SizedBox(height: 8),
+            const Text(
+              '点击重试',
+              style: TextStyle(
+                fontSize: 14,
+                color: Color(0xFFD4AF37),
+                fontWeight: FontWeight.w600,
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  /// 主内容区域
+  Widget _buildContent() {
+    return RefreshIndicator(
+      onRefresh: _loadData,
+      color: const Color(0xFFD4AF37),
+      child: Column(
+        children: [
+          // 持仓概览 + 进度条
+          _buildPositionSummary(),
+          const SizedBox(height: 8),
+          // Tab 切换
+          _buildTabBar(),
+          // Tab 内容
+          Expanded(
+            child: TabBarView(
+              controller: _tabController,
+              children: [
+                _buildOrdersList(),
+                _buildMergesList(),
+              ],
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  /// 持仓概览卡片
+  Widget _buildPositionSummary() {
+    final pos = _position!;
+    final available = pos.availablePortions;
+    final progress = available / _portionsPerTree;
+
+    return Padding(
+      padding: const EdgeInsets.fromLTRB(16, 16, 16, 0),
+      child: Container(
+        width: double.infinity,
+        padding: const EdgeInsets.all(16),
+        decoration: BoxDecoration(
+          color: const Color(0x99FFFFFF),
+          borderRadius: BorderRadius.circular(12),
+          boxShadow: const [
+            BoxShadow(
+              color: Color(0x1A000000),
+              blurRadius: 6,
+              offset: Offset(0, 4),
+            ),
+            BoxShadow(
+              color: Color(0x1A000000),
+              blurRadius: 4,
+              offset: Offset(0, 2),
+            ),
+          ],
+        ),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            // 三列统计数据
+            Row(
+              children: [
+                _buildStatItem('累计份数', '${pos.totalPortions}'),
+                _buildStatDivider(),
+                _buildStatItem('待合并', '$available'),
+                _buildStatDivider(),
+                _buildStatItem('已合成树', '${pos.totalTreesMerged}'),
+              ],
+            ),
+            const SizedBox(height: 16),
+            // 合并进度条
+            const Text(
+              '合并进度',
+              style: TextStyle(
+                fontSize: 14,
+                fontFamily: 'Inter',
+                fontWeight: FontWeight.w500,
+                color: Color(0xFF745D43),
+              ),
+            ),
+            const SizedBox(height: 8),
+            ClipRRect(
+              borderRadius: BorderRadius.circular(4),
+              child: LinearProgressIndicator(
+                value: progress,
+                minHeight: 10,
+                backgroundColor: const Color(0xFFEAE0C8),
+                valueColor:
+                    const AlwaysStoppedAnimation<Color>(Color(0xFFD4AF37)),
+              ),
+            ),
+            const SizedBox(height: 6),
+            Row(
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: [
+                Text(
+                  '$available / $_portionsPerTree 份',
+                  style: const TextStyle(
+                    fontSize: 14,
+                    fontWeight: FontWeight.w600,
+                    color: Color(0xFF5D4037),
+                  ),
+                ),
+                Text(
+                  available == 0
+                      ? '开始购买即可积累'
+                      : '还需 ${_portionsPerTree - available} 份合成 1 棵树',
+                  style: const TextStyle(
+                    fontSize: 12,
+                    color: Color(0xFF745D43),
+                  ),
+                ),
+              ],
+            ),
+            // 省市信息（如有）
+            if (pos.hasProvinceCity) ...[
+              const SizedBox(height: 12),
+              Row(
+                children: [
+                  const Icon(
+                    Icons.location_on_outlined,
+                    color: Color(0xFF745D43),
+                    size: 16,
+                  ),
+                  const SizedBox(width: 4),
+                  Text(
+                    '${pos.provinceName ?? pos.provinceCode} · ${pos.cityName ?? pos.cityCode}',
+                    style: const TextStyle(
+                      fontSize: 13,
+                      color: Color(0xFF745D43),
+                    ),
+                  ),
+                ],
+              ),
+            ],
+          ],
+        ),
+      ),
+    );
+  }
+
+  /// 统计项
+  Widget _buildStatItem(String label, String value) {
+    return Expanded(
+      child: Column(
+        children: [
+          Text(
+            value,
+            style: const TextStyle(
+              fontSize: 28,
+              fontFamily: 'Inter',
+              fontWeight: FontWeight.w700,
+              color: Color(0xFF5D4037),
+            ),
+          ),
+          const SizedBox(height: 4),
+          Text(
+            label,
+            style: const TextStyle(
+              fontSize: 12,
+              color: Color(0xFF745D43),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  /// 统计项分隔线
+  Widget _buildStatDivider() {
+    return Container(
+      width: 1,
+      height: 40,
+      color: const Color(0x338B5A2B),
+    );
+  }
+
+  /// Tab 栏
+  Widget _buildTabBar() {
+    return Container(
+      margin: const EdgeInsets.symmetric(horizontal: 16),
+      decoration: const BoxDecoration(
+        border: Border(
+          bottom: BorderSide(color: Color(0x338B5A2B), width: 1),
+        ),
+      ),
+      child: TabBar(
+        controller: _tabController,
+        labelColor: const Color(0xFFD4AF37),
+        unselectedLabelColor: const Color(0xFF745D43),
+        indicatorColor: const Color(0xFFD4AF37),
+        indicatorWeight: 2,
+        labelStyle: const TextStyle(
+          fontSize: 15,
+          fontFamily: 'Inter',
+          fontWeight: FontWeight.w600,
+        ),
+        unselectedLabelStyle: const TextStyle(
+          fontSize: 15,
+          fontFamily: 'Inter',
+          fontWeight: FontWeight.w400,
+        ),
+        tabs: [
+          Tab(text: '预种订单 (${_orders.length})'),
+          Tab(text: '合并记录 (${_merges.length})'),
+        ],
+      ),
+    );
+  }
+
+  /// 订单列表
+  Widget _buildOrdersList() {
+    if (_orders.isEmpty) {
+      return _buildEmptyState('暂无预种订单', '购买预种份额后，订单将在此显示');
+    }
+
+    return ListView.builder(
+      padding: const EdgeInsets.all(16),
+      itemCount: _orders.length,
+      itemBuilder: (context, index) => _buildOrderCard(_orders[index]),
+    );
+  }
+
+  /// 合并记录列表
+  Widget _buildMergesList() {
+    if (_merges.isEmpty) {
+      return _buildEmptyState('暂无合并记录', '累计 5 份后将自动合成 1 棵树');
+    }
+
+    return ListView.builder(
+      padding: const EdgeInsets.all(16),
+      itemCount: _merges.length,
+      itemBuilder: (context, index) => _buildMergeCard(_merges[index]),
+    );
+  }
+
+  /// 空状态
+  Widget _buildEmptyState(String title, String subtitle) {
+    return Center(
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Icon(
+            Icons.inbox_outlined,
+            color: const Color(0xFF745D43).withValues(alpha: 0.4),
+            size: 48,
+          ),
+          const SizedBox(height: 12),
+          Text(
+            title,
+            style: const TextStyle(
+              fontSize: 16,
+              fontWeight: FontWeight.w500,
+              color: Color(0xFF5D4037),
+            ),
+          ),
+          const SizedBox(height: 4),
+          Text(
+            subtitle,
+            style: TextStyle(
+              fontSize: 13,
+              color: const Color(0xFF745D43).withValues(alpha: 0.7),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  /// 预种订单卡片
+  Widget _buildOrderCard(PrePlantingOrder order) {
+    return Container(
+      margin: const EdgeInsets.only(bottom: 12),
+      padding: const EdgeInsets.all(16),
+      decoration: BoxDecoration(
+        color: const Color(0x99FFFFFF),
+        borderRadius: BorderRadius.circular(12),
+        boxShadow: const [
+          BoxShadow(
+            color: Color(0x0D000000),
+            blurRadius: 4,
+            offset: Offset(0, 2),
+          ),
+        ],
+      ),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          // 顶部：订单号 + 状态标签
+          Row(
+            mainAxisAlignment: MainAxisAlignment.spaceBetween,
+            children: [
+              Expanded(
+                child: Text(
+                  order.orderNo,
+                  style: const TextStyle(
+                    fontSize: 14,
+                    fontFamily: 'Inter',
+                    fontWeight: FontWeight.w600,
+                    color: Color(0xFF5D4037),
+                  ),
+                  overflow: TextOverflow.ellipsis,
+                ),
+              ),
+              const SizedBox(width: 8),
+              _buildStatusLabel(order.status),
+            ],
+          ),
+          const SizedBox(height: 10),
+          // 中部：份数 + 金额
+          Row(
+            children: [
+              _buildInfoChip(
+                Icons.layers_outlined,
+                '${order.portionCount} 份',
+              ),
+              const SizedBox(width: 16),
+              _buildInfoChip(
+                Icons.monetization_on_outlined,
+                '${order.totalAmount.toInt()} USDT',
+              ),
+            ],
+          ),
+          const SizedBox(height: 10),
+          // 底部：时间
+          Text(
+            _formatDateTime(order.paidAt ?? order.createdAt),
+            style: TextStyle(
+              fontSize: 12,
+              color: const Color(0xFF745D43).withValues(alpha: 0.7),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  /// 合并记录卡片
+  Widget _buildMergeCard(PrePlantingMerge merge) {
+    return GestureDetector(
+      onTap: () => _goToMergeDetail(merge.mergeNo),
+      child: Container(
+        margin: const EdgeInsets.only(bottom: 12),
+        padding: const EdgeInsets.all(16),
+        decoration: BoxDecoration(
+          color: const Color(0x99FFFFFF),
+          borderRadius: BorderRadius.circular(12),
+          border: merge.contractStatus == PrePlantingContractStatus.pending
+              ? Border.all(
+                  color: const Color(0xFFD4AF37).withValues(alpha: 0.5),
+                  width: 1,
+                )
+              : null,
+          boxShadow: const [
+            BoxShadow(
+              color: Color(0x0D000000),
+              blurRadius: 4,
+              offset: Offset(0, 2),
+            ),
+          ],
+        ),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            // 顶部：合并号 + 合同状态
+            Row(
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: [
+                Row(
+                  children: [
+                    const Icon(Icons.park, color: Color(0xFFD4AF37), size: 20),
+                    const SizedBox(width: 8),
+                    Text(
+                      merge.mergeNo,
+                      style: const TextStyle(
+                        fontSize: 14,
+                        fontFamily: 'Inter',
+                        fontWeight: FontWeight.w600,
+                        color: Color(0xFF5D4037),
+                      ),
+                    ),
+                  ],
+                ),
+                _buildContractStatusLabel(merge.contractStatus),
+              ],
+            ),
+            const SizedBox(height: 10),
+            // 中部：信息
+            Row(
+              children: [
+                _buildInfoChip(Icons.park_outlined, '${merge.treeCount} 棵树'),
+                const SizedBox(width: 16),
+                _buildInfoChip(
+                  Icons.layers_outlined,
+                  '${merge.sourceOrderNos.length} 份合并',
+                ),
+              ],
+            ),
+            // 待签约提示
+            if (merge.contractStatus == PrePlantingContractStatus.pending) ...[
+              const SizedBox(height: 10),
+              Container(
+                width: double.infinity,
+                padding: const EdgeInsets.all(8),
+                decoration: BoxDecoration(
+                  color: const Color(0xFFD4AF37).withValues(alpha: 0.1),
+                  borderRadius: BorderRadius.circular(6),
+                ),
+                child: const Row(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  children: [
+                    Icon(Icons.edit_document, color: Color(0xFFD4AF37), size: 16),
+                    SizedBox(width: 6),
+                    Text(
+                      '点击签署合同',
+                      style: TextStyle(
+                        fontSize: 13,
+                        fontWeight: FontWeight.w600,
+                        color: Color(0xFFD4AF37),
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+            ],
+            const SizedBox(height: 10),
+            // 底部：时间
+            Text(
+              '合并时间：${_formatDateTime(merge.mergedAt)}',
+              style: TextStyle(
+                fontSize: 12,
+                color: const Color(0xFF745D43).withValues(alpha: 0.7),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  /// 订单状态标签
+  Widget _buildStatusLabel(PrePlantingOrderStatus status) {
+    late String text;
+    late Color bgColor;
+    late Color textColor;
+
+    switch (status) {
+      case PrePlantingOrderStatus.created:
+        text = '待支付';
+        bgColor = const Color(0xFFFFF3E0);
+        textColor = const Color(0xFFE65100);
+        break;
+      case PrePlantingOrderStatus.paid:
+        text = '已支付';
+        bgColor = const Color(0xFFE8F5E9);
+        textColor = const Color(0xFF2E7D32);
+        break;
+      case PrePlantingOrderStatus.merged:
+        text = '已合并';
+        bgColor = const Color(0xFFD4AF37).withValues(alpha: 0.15);
+        textColor = const Color(0xFFD4AF37);
+        break;
+    }
+
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+      decoration: BoxDecoration(
+        color: bgColor,
+        borderRadius: BorderRadius.circular(12),
+      ),
+      child: Text(
+        text,
+        style: TextStyle(
+          fontSize: 12,
+          fontWeight: FontWeight.w600,
+          color: textColor,
+        ),
+      ),
+    );
+  }
+
+  /// 合同状态标签
+  Widget _buildContractStatusLabel(PrePlantingContractStatus status) {
+    late String text;
+    late Color bgColor;
+    late Color textColor;
+
+    switch (status) {
+      case PrePlantingContractStatus.pending:
+        text = '待签约';
+        bgColor = const Color(0xFFFFF3E0);
+        textColor = const Color(0xFFE65100);
+        break;
+      case PrePlantingContractStatus.signed:
+        text = '已签约';
+        bgColor = const Color(0xFFE8F5E9);
+        textColor = const Color(0xFF2E7D32);
+        break;
+      case PrePlantingContractStatus.expired:
+        text = '已过期';
+        bgColor = const Color(0xFFEEEEEE);
+        textColor = const Color(0xFF757575);
+        break;
+    }
+
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+      decoration: BoxDecoration(
+        color: bgColor,
+        borderRadius: BorderRadius.circular(12),
+      ),
+      child: Text(
+        text,
+        style: TextStyle(
+          fontSize: 12,
+          fontWeight: FontWeight.w600,
+          color: textColor,
+        ),
+      ),
+    );
+  }
+
+  /// 信息小标签（图标 + 文字）
+  Widget _buildInfoChip(IconData icon, String text) {
+    return Row(
+      mainAxisSize: MainAxisSize.min,
+      children: [
+        Icon(icon, color: const Color(0xFF745D43), size: 16),
+        const SizedBox(width: 4),
+        Text(
+          text,
+          style: const TextStyle(
+            fontSize: 13,
+            color: Color(0xFF745D43),
+          ),
+        ),
+      ],
+    );
+  }
+
+  /// 格式化日期时间
+  String _formatDateTime(DateTime dt) {
+    return '${dt.year}-${dt.month.toString().padLeft(2, '0')}-'
+        '${dt.day.toString().padLeft(2, '0')} '
+        '${dt.hour.toString().padLeft(2, '0')}:'
+        '${dt.minute.toString().padLeft(2, '0')}';
+  }
 }