diff --git a/backend/services/planting-service/src/pre-planting/api/dto/request/purchase-pre-planting.dto.ts b/backend/services/planting-service/src/pre-planting/api/dto/request/purchase-pre-planting.dto.ts
index e564aeb8..126bdc76 100644
--- a/backend/services/planting-service/src/pre-planting/api/dto/request/purchase-pre-planting.dto.ts
+++ b/backend/services/planting-service/src/pre-planting/api/dto/request/purchase-pre-planting.dto.ts
@@ -18,10 +18,10 @@ import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
  * 参考：认种正式购买 SelectProvinceCityDto 的同名字段处理方式。
  */
 export class PurchasePrePlantingDto {
-  @ApiProperty({ description: '购买份数', example: 1, minimum: 1, maximum: 5 })
+  @ApiProperty({ description: '购买份数', example: 1, minimum: 1, maximum: 10 })
   @IsInt()
   @Min(1)
-  @Max(5)
+  @Max(10)
   portionCount: number;
 
   @ApiProperty({ description: '省代码（行政区划代码前两位）', example: '44' })
diff --git a/backend/services/planting-service/src/pre-planting/application/services/pre-planting-application.service.ts b/backend/services/planting-service/src/pre-planting/application/services/pre-planting-application.service.ts
index 3037ca4d..995415d2 100644
--- a/backend/services/planting-service/src/pre-planting/application/services/pre-planting-application.service.ts
+++ b/backend/services/planting-service/src/pre-planting/application/services/pre-planting-application.service.ts
@@ -62,8 +62,8 @@ export class PrePlantingApplicationService {
 
     // 获取当前定价配置（含总部运营成本压力涨价）
     const pricingConfig = await this.treePricingClient.getTreePricingConfig();
-    // 预种每份加价 = Math.floor(每棵树加价 / 5)，涨价部分全额归总部 (S0000000001)
-    const portionSupplement = Math.floor(pricingConfig.currentSupplement / 5);
+    // 预种每份加价 = Math.floor(每棵树加价 / 份数)，涨价部分全额归总部 (S0000000001)
+    const portionSupplement = Math.floor(pricingConfig.currentSupplement / PRE_PLANTING_PORTIONS_PER_TREE);
 
     const orderNo = this.generateOrderNo();
     const totalAmount = portionCount * (PRE_PLANTING_PRICE_PER_PORTION + portionSupplement);
@@ -564,7 +564,7 @@ export class PrePlantingApplicationService {
       throw new BadRequestException('预种功能已关闭，您当前份额已满，无法继续购买');
     }
     if (portionCount > maxAdditional) {
-      throw new BadRequestException(`当前只可再购买 ${maxAdditional} 份以凑满5份`);
+      throw new BadRequestException(`当前只可再购买 ${maxAdditional} 份以凑满 ${PRE_PLANTING_PORTIONS_PER_TREE} 份`);
     }
   }
 
@@ -574,7 +574,7 @@ export class PrePlantingApplicationService {
     accountSequence: string,
     position: import('../../domain/aggregates/pre-planting-position.aggregate').PrePlantingPosition,
   ) {
-    // 获取 5 笔待合并的已支付订单
+    // 获取待合并的已支付订单（数量由 PRE_PLANTING_PORTIONS_PER_TREE 决定）
     const paidOrders = await this.orderRepo.findPaidOrdersByUserId(
       tx,
       userId,
@@ -582,7 +582,7 @@ export class PrePlantingApplicationService {
     );
 
     if (paidOrders.length < PRE_PLANTING_PORTIONS_PER_TREE) {
-      throw new Error('不足 5 笔已支付订单进行合并');
+      throw new Error(`不足 ${PRE_PLANTING_PORTIONS_PER_TREE} 笔已支付订单进行合并`);
     }
 
     const sourceOrders = paidOrders.slice(0, PRE_PLANTING_PORTIONS_PER_TREE);
@@ -605,7 +605,7 @@ export class PrePlantingApplicationService {
     );
     await this.mergeRepo.save(tx, merge);
 
-    // 标记 5 笔订单为已合并
+    // 标记源订单为已合并
     for (const order of sourceOrders) {
       order.markAsMerged(merge.id!);
       await this.orderRepo.save(tx, order);
diff --git a/backend/services/planting-service/src/pre-planting/domain/aggregates/pre-planting-merge.aggregate.ts b/backend/services/planting-service/src/pre-planting/domain/aggregates/pre-planting-merge.aggregate.ts
index 412534dd..fd3d2301 100644
--- a/backend/services/planting-service/src/pre-planting/domain/aggregates/pre-planting-merge.aggregate.ts
+++ b/backend/services/planting-service/src/pre-planting/domain/aggregates/pre-planting-merge.aggregate.ts
@@ -1,4 +1,5 @@
 import { PrePlantingContractStatus } from '../value-objects/pre-planting-contract-status.enum';
+import { PRE_PLANTING_PORTIONS_PER_TREE } from '../value-objects/pre-planting-right-amounts';
 import { DomainEvent } from '../../../domain/events/domain-event.interface';
 import { PrePlantingMergedEvent } from '../events/pre-planting-merged.event';
 import { PrePlantingContractSignedEvent } from '../events/pre-planting-contract-signed.event';
@@ -69,8 +70,8 @@ export class PrePlantingMerge {
     cityCode: string,
     totalTreesMergedAfter: number,
   ): PrePlantingMerge {
-    if (sourceOrderNos.length !== 5) {
-      throw new Error(`合并需要 5 个订单，收到 ${sourceOrderNos.length} 个`);
+    if (sourceOrderNos.length !== PRE_PLANTING_PORTIONS_PER_TREE) {
+      throw new Error(`合并需要 ${PRE_PLANTING_PORTIONS_PER_TREE} 个订单，收到 ${sourceOrderNos.length} 个`);
     }
 
     const merge = new PrePlantingMerge(
diff --git a/backend/services/planting-service/src/pre-planting/domain/aggregates/pre-planting-position.aggregate.ts b/backend/services/planting-service/src/pre-planting/domain/aggregates/pre-planting-position.aggregate.ts
index 1ef29f46..39f15f78 100644
--- a/backend/services/planting-service/src/pre-planting/domain/aggregates/pre-planting-position.aggregate.ts
+++ b/backend/services/planting-service/src/pre-planting/domain/aggregates/pre-planting-position.aggregate.ts
@@ -91,7 +91,7 @@ export class PrePlantingPosition {
   }
 
   /**
-   * 执行合并（消耗 5 份）
+   * 执行合并（消耗 PRE_PLANTING_PORTIONS_PER_TREE 份）
    */
   performMerge(): void {
     if (!this.canMerge()) {
diff --git a/backend/services/planting-service/src/pre-planting/domain/value-objects/pre-planting-right-amounts.ts b/backend/services/planting-service/src/pre-planting/domain/value-objects/pre-planting-right-amounts.ts
index 079c8e80..8f13ac43 100644
--- a/backend/services/planting-service/src/pre-planting/domain/value-objects/pre-planting-right-amounts.ts
+++ b/backend/services/planting-service/src/pre-planting/domain/value-objects/pre-planting-right-amounts.ts
@@ -1,26 +1,53 @@
 /**
- * 预种 1/5 分配金额常量
+ * 预种 1/10 分配金额常量
  *
- * 基准：reward-service 的 RIGHT_AMOUNTS（15831 整棵树）
- * 9 项 = floor(整棵树金额 / 5) 取整，余额全归总部社区（HQ_BASE_FEE）
+ * === 变更历史 ===
+ * [2026-03-01] 调整预种方案：
+ *   - 全树基础价 15831 → 18870 USDT
+ *   - 每树份数    5 份  → 10 份
+ *   - 每份价格   3566  → 1887 USDT
+ *
+ * === 计算规则 ===
+ * 基准：reward-service 的 RIGHT_AMOUNTS（整棵树的 10 类权益金额）
+ * 9 项 = floor(整棵树金额 / 10) 取整，余额全归总部社区（HEADQUARTERS_BASE_FEE）
+ *
+ * === 整棵树权益金额 & 每份拆分 ===
+ *   权益类型            整棵树金额   floor(/10)   10份合计   余数(归HQ)
+ *   COST_FEE              2880        288         2880        0
+ *   OPERATION_FEE          2100        210         2100        0
+ *   RWAD_POOL_INJECTION    5760        576         5760        0
+ *   SHARE_RIGHT            3600        360         3600        0
+ *   PROVINCE_AREA_RIGHT     108         10          100        8
+ *   PROVINCE_TEAM_RIGHT     144         14          140        4
+ *   CITY_AREA_RIGHT         252         25          250        2
+ *   CITY_TEAM_RIGHT         288         28          280        8
+ *   COMMUNITY_RIGHT         576         57          570        6
+ *   ─────────────────────────────────────────────────────────────
+ *   小计（9项）           15708       1568        15680       28
+ *   HQ_BASE_FEE = 1887 - 1568 = 319（吸收全部整除余数 28）
+ *   ─────────────────────────────────────────────────────────────
+ *   合计每份              18870/10    1887        18870        0
  */
 export const PRE_PLANTING_RIGHT_AMOUNTS = {
-  COST_FEE: 576,                // floor(2880/5)
-  OPERATION_FEE: 420,           // floor(2100/5)
-  HEADQUARTERS_BASE_FEE: 427,   // 3566 - 3139 = 427（吸收全部余额）
-  RWAD_POOL_INJECTION: 1152,    // floor(5760/5)
-  SHARE_RIGHT: 720,             // floor(3600/5)
-  PROVINCE_AREA_RIGHT: 21,      // floor(108/5)
-  PROVINCE_TEAM_RIGHT: 28,      // floor(144/5)
-  CITY_AREA_RIGHT: 50,          // floor(252/5)
-  CITY_TEAM_RIGHT: 57,          // floor(288/5)
-  COMMUNITY_RIGHT: 115,         // floor(576/5)
+  COST_FEE: 288,                // floor(2880/10)
+  OPERATION_FEE: 210,           // floor(2100/10)
+  HEADQUARTERS_BASE_FEE: 319,   // 1887 - 1568 = 319（吸收全部余额）
+  RWAD_POOL_INJECTION: 576,     // floor(5760/10)
+  SHARE_RIGHT: 360,             // floor(3600/10)
+  PROVINCE_AREA_RIGHT: 10,      // floor(108/10)
+  PROVINCE_TEAM_RIGHT: 14,      // floor(144/10)
+  CITY_AREA_RIGHT: 25,          // floor(252/10)
+  CITY_TEAM_RIGHT: 28,          // floor(288/10)
+  COMMUNITY_RIGHT: 57,          // floor(576/10)
 } as const;
 
-// 合计 = 576 + 420 + 427 + 1152 + 720 + 21 + 28 + 50 + 57 + 115 = 3566
+// 合计 = 288 + 210 + 319 + 576 + 360 + 10 + 14 + 25 + 28 + 57 = 1887
 
-export const PRE_PLANTING_PRICE_PER_PORTION = 3566;
-export const PRE_PLANTING_PORTIONS_PER_TREE = 5;
+/** 每份价格（USDT），全树 18870 / 10 = 1887 */
+export const PRE_PLANTING_PRICE_PER_PORTION = 1887;
+
+/** 合并阈值：购满此数量自动合并为 1 棵树 */
+export const PRE_PLANTING_PORTIONS_PER_TREE = 10;
 
 /**
  * 预种分配权益类型
diff --git a/backend/services/planting-service/src/pre-planting/pre-planting.module.ts b/backend/services/planting-service/src/pre-planting/pre-planting.module.ts
index abdc87cd..d34a7b4f 100644
--- a/backend/services/planting-service/src/pre-planting/pre-planting.module.ts
+++ b/backend/services/planting-service/src/pre-planting/pre-planting.module.ts
@@ -22,10 +22,11 @@ import { PrePlantingReferralClient } from './infrastructure/external/pre-plantin
 import { PrePlantingAuthorizationClient } from './infrastructure/external/pre-planting-authorization.client';
 
 /**
- * 预种计划模块 (3566 预种计划 / 拼种团购计划)
+ * 预种计划模块 (预种计划 / 拼种团购计划)
  *
  * === 功能概述 ===
- * 用户以 3566 USDT/份 参与认种（1棵树的1/5价格），累计5份自动合成1棵树，
+ * [2026-03-01] 方案调整：1887 USDT/份 × 10 份 = 18870 USDT/棵（原 3566 × 5 = 17830）
+ * 用户以 1887 USDT/份 参与认种（1棵树的1/10价格），累计10份自动合成1棵树，
  * 触发合同签署和挖矿开启，同时解除交易和提现限制。
  *
  * === 架构设计 ===
diff --git a/frontend/mobile-app/lib/core/constants/api_endpoints.dart b/frontend/mobile-app/lib/core/constants/api_endpoints.dart
index 2c3b566d..079e4143 100644
--- a/frontend/mobile-app/lib/core/constants/api_endpoints.dart
+++ b/frontend/mobile-app/lib/core/constants/api_endpoints.dart
@@ -98,7 +98,7 @@ class ApiEndpoints {
   static const String pendingActionsComplete = '/user/pending-actions'; // POST /:id/complete
 
   // [2026-02-17] 预种计划 (-> Planting Service / PrePlantingModule)
-  // 3566 USDT/份预种，累计 5 份自动合成 1 棵树
+  // 1887 USDT/份预种，累计 10 份自动合成 1 棵树
   // 所有端点与现有 /planting/* 完全独立
   static const String prePlanting = '/pre-planting';
   static const String prePlantingConfig = '$prePlanting/config';           // 开关配置
diff --git a/frontend/mobile-app/lib/core/di/injection_container.dart b/frontend/mobile-app/lib/core/di/injection_container.dart
index bdb0ceff..32c9f379 100644
--- a/frontend/mobile-app/lib/core/di/injection_container.dart
+++ b/frontend/mobile-app/lib/core/di/injection_container.dart
@@ -9,7 +9,7 @@ import '../services/authorization_service.dart';
 import '../services/deposit_service.dart';
 import '../services/wallet_service.dart';
 import '../services/planting_service.dart';
-// [2026-02-17] 新增：预种计划服务（3566 USDT/份，独立于现有认种）
+// [2026-02-17] 新增：预种计划服务（1887 USDT/份，独立于现有认种）
 import '../services/pre_planting_service.dart';
 // [2026-02-19] 纯新增：树转让服务（已认种树所有权转让）
 import '../services/transfer_service.dart';
@@ -102,7 +102,7 @@ final plantingServiceProvider = Provider<PlantingService>((ref) {
 });
 
 // [2026-02-17] Pre-Planting Service Provider (调用 planting-service / PrePlantingModule)
-// 预种计划：3566 USDT/份，累计 5 份合成 1 棵树。与上方 PlantingService 完全独立。
+// 预种计划：1887 USDT/份，累计 10 份合成 1 棵树。与上方 PlantingService 完全独立。
 final prePlantingServiceProvider = Provider<PrePlantingService>((ref) {
   final apiClient = ref.watch(apiClientProvider);
   return PrePlantingService(apiClient: apiClient);
diff --git a/frontend/mobile-app/lib/core/services/pre_planting_service.dart b/frontend/mobile-app/lib/core/services/pre_planting_service.dart
index 29809314..1390cc26 100644
--- a/frontend/mobile-app/lib/core/services/pre_planting_service.dart
+++ b/frontend/mobile-app/lib/core/services/pre_planting_service.dart
@@ -7,8 +7,9 @@ import '../network/api_client.dart';
 // [2026-02-17] 预种计划 API 服务
 // ============================================
 //
-// 3566 预种计划（拼种/团购计划）的 Flutter 端 API 调用服务。
-// 用户以 3566 USDT/份参与认种，累计 5 份自动合成 1 棵树。
+// 预种计划（拼种/团购计划）的 Flutter 端 API 调用服务。
+// [2026-03-01] 方案调整：1887 USDT/份 × 10 份 = 18870 USDT/棵
+// 用户以 1887 USDT/份参与认种，累计 10 份自动合成 1 棵树。
 //
 // === API 端点 ===
 // 所有端点走 planting-service 的 PrePlantingModule：
@@ -22,8 +23,8 @@ import '../network/api_client.dart';
 // - POST /pre-planting/sign-contract  签署合并合同
 //
 // === 与现有 PlantingService 的关系 ===
-// 完全独立。PlantingService 处理整棵树认种（15831 USDT/棵），
-// PrePlantingService 处理预种份额（3566 USDT/份）。
+// 完全独立。PlantingService 处理整棵树认种（18870 USDT/棵），
+// PrePlantingService 处理预种份额（1887 USDT/份）。
 // 两者调用不同的 API 端点，互不影响。
 
 /// 预种订单状态
@@ -117,7 +118,7 @@ class PrePlantingPosition {
 class PrePlantingOrder {
   final String orderNo;
   final int portionCount;        // 购买份数（通常为 1）
-  final double pricePerPortion;  // 每份价格（3566 USDT）
+  final double pricePerPortion;  // 每份价格（1887 USDT）
   final double totalAmount;      // 总金额
   final PrePlantingOrderStatus status;
   final String? mergedToMergeId; // 合并后指向的 MergeId
@@ -141,8 +142,8 @@ class PrePlantingOrder {
     return PrePlantingOrder(
       orderNo: json['orderNo'] ?? '',
       portionCount: json['portionCount'] ?? 1,
-      pricePerPortion: (json['pricePerPortion'] ?? 3566).toDouble(),
-      totalAmount: (json['totalAmount'] ?? 3566).toDouble(),
+      pricePerPortion: (json['pricePerPortion'] ?? 1887).toDouble(),
+      totalAmount: (json['totalAmount'] ?? 1887).toDouble(),
       status: _parseStatus(json['status']),
       mergedToMergeId: json['mergedToMergeId']?.toString(),
       paidAt: json['paidAt'] != null ? DateTime.parse(json['paidAt']) : null,
@@ -248,8 +249,8 @@ class CreatePrePlantingOrderResponse {
     return CreatePrePlantingOrderResponse(
       orderNo: json['orderNo'] ?? '',
       portionCount: json['portionCount'] ?? 1,
-      totalAmount: (json['totalAmount'] ?? 3566).toDouble(),
-      pricePerPortion: (json['pricePerPortion'] ?? 3566).toDouble(),
+      totalAmount: (json['totalAmount'] ?? 1887).toDouble(),
+      pricePerPortion: (json['pricePerPortion'] ?? 1887).toDouble(),
       merged: json['merged'] == true,
       mergeNo: json['mergeNo']?.toString(),
     );
diff --git a/frontend/mobile-app/lib/core/services/tree_pricing_service.dart b/frontend/mobile-app/lib/core/services/tree_pricing_service.dart
index c9cedc70..293272df 100644
--- a/frontend/mobile-app/lib/core/services/tree_pricing_service.dart
+++ b/frontend/mobile-app/lib/core/services/tree_pricing_service.dart
@@ -5,12 +5,12 @@ import '../network/api_client.dart';
 ///
 /// 总部运营成本压力涨价：基础价不变，加价部分全额归总部。
 /// - 正式认种总价 = basePrice + currentSupplement
-/// - 预种总价 = totalPrice / 5（取整）
+/// - 预种总价 = totalPrice / 10（取整）
 class TreePricingConfig {
-  /// 正式认种基础价（固定 15831）
+  /// 正式认种基础价（固定 18870）
   final int basePrice;
 
-  /// 预种基础价（固定 3566）
+  /// 预种基础价（固定 1887）
   final int basePortionPrice;
 
   /// 当前加价金额
@@ -48,11 +48,11 @@ class TreePricingConfig {
 
   factory TreePricingConfig.fromJson(Map<String, dynamic> json) {
     return TreePricingConfig(
-      basePrice: json['basePrice'] ?? 15831,
-      basePortionPrice: json['basePortionPrice'] ?? 3566,
+      basePrice: json['basePrice'] ?? 18870,
+      basePortionPrice: json['basePortionPrice'] ?? 1887,
       currentSupplement: json['currentSupplement'] ?? 0,
-      totalPrice: json['totalPrice'] ?? 15831,
-      totalPortionPrice: json['totalPortionPrice'] ?? 3566,
+      totalPrice: json['totalPrice'] ?? 18870,
+      totalPortionPrice: json['totalPortionPrice'] ?? 1887,
       autoIncreaseEnabled: json['autoIncreaseEnabled'] ?? false,
       autoIncreaseAmount: json['autoIncreaseAmount'] ?? 0,
       autoIncreaseIntervalDays: json['autoIncreaseIntervalDays'] ?? 0,
@@ -65,11 +65,11 @@ class TreePricingConfig {
   /// 默认配置（supplement=0，与原硬编码价格一致）
   factory TreePricingConfig.defaultConfig() {
     return TreePricingConfig(
-      basePrice: 15831,
-      basePortionPrice: 3566,
+      basePrice: 18870,
+      basePortionPrice: 1887,
       currentSupplement: 0,
-      totalPrice: 15831,
-      totalPortionPrice: 3566,
+      totalPrice: 18870,
+      totalPortionPrice: 1887,
       autoIncreaseEnabled: false,
       autoIncreaseAmount: 0,
       autoIncreaseIntervalDays: 0,
diff --git a/frontend/mobile-app/lib/features/pre_planting/presentation/pages/pre_planting_merge_detail_page.dart b/frontend/mobile-app/lib/features/pre_planting/presentation/pages/pre_planting_merge_detail_page.dart
index aa32d889..4754d1e5 100644
--- a/frontend/mobile-app/lib/features/pre_planting/presentation/pages/pre_planting_merge_detail_page.dart
+++ b/frontend/mobile-app/lib/features/pre_planting/presentation/pages/pre_planting_merge_detail_page.dart
@@ -324,7 +324,7 @@ class _PrePlantingMergeDetailPageState
           const SizedBox(height: 8),
           _buildDetailRow(
             '总价值',
-            '${(merge.sourceOrderNos.length * 3566).toString()} 绿积分',
+            '${(merge.sourceOrderNos.length * 1887).toString()} 绿积分',
           ),
           if (merge.selectedProvince != null) ...[
             const SizedBox(height: 8),
@@ -508,7 +508,7 @@ class _PrePlantingMergeDetailPageState
                     ),
                   ),
                   const Text(
-                    '3,171 绿积分',
+                    '1,887 绿积分',
                     style: TextStyle(
                       fontSize: 13,
                       color: Color(0xFF745D43),
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 3653124e..db46f247 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
@@ -11,7 +11,7 @@ import '../../../../routes/route_paths.dart';
 //
 // 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
+// - 合并进度条：当前 N/10 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）
 //
@@ -40,7 +40,7 @@ class _PrePlantingPositionPageState
     extends ConsumerState<PrePlantingPositionPage>
     with SingleTickerProviderStateMixin {
   // === 常量 ===
-  static const int _portionsPerTree = 5;
+  static const int _portionsPerTree = 10;
 
   // === 状态 ===
 
diff --git a/frontend/mobile-app/lib/features/pre_planting/presentation/pages/pre_planting_purchase_page.dart b/frontend/mobile-app/lib/features/pre_planting/presentation/pages/pre_planting_purchase_page.dart
index e0530e23..f1ae714a 100644
--- a/frontend/mobile-app/lib/features/pre_planting/presentation/pages/pre_planting_purchase_page.dart
+++ b/frontend/mobile-app/lib/features/pre_planting/presentation/pages/pre_planting_purchase_page.dart
@@ -12,8 +12,9 @@ import '../../../../routes/route_paths.dart';
 // ============================================
 //
 // 预种计划（拼种/团购计划）的购买页面：
-// - 用户以 3566 USDT/份 购买预种份额
-// - 累计 5 份自动合成 1 棵树
+// [2026-03-01] 方案调整：1887 USDT/份 × 10 份 = 18870 USDT/棵
+// - 用户以 1887 USDT/份 购买预种份额
+// - 累计 10 份自动合成 1 棵树
 // - 首次购买需选择省市（后续复用，不可更改）
 // - 显示余额、份数选择、合并进度、价格明细
 //
@@ -24,12 +25,12 @@ import '../../../../routes/route_paths.dart';
 // 4. 购买成功：后端自动扣款、分配权益、检查合并
 //
 // === 与现有认种页面的关系 ===
-// planting_quantity_page.dart → 整棵树认种（15831 USDT/棵）
-// 本页面 → 预种份额购买（3566 USDT/份），完全独立的流程
+// planting_quantity_page.dart → 整棵树认种（18870 USDT/棵）
+// 本页面 → 预种份额购买（1887 USDT/份），完全独立的流程
 
 /// 预种计划购买页面
 ///
-/// 用户可以购买预种份额（3566 USDT/份），累计 5 份自动合成 1 棵树。
+/// 用户可以购买预种份额（1887 USDT/份），累计 10 份自动合成 1 棵树。
 /// 首次购买需选择省市（后续购买自动复用）。
 class PrePlantingPurchasePage extends ConsumerStatefulWidget {
   const PrePlantingPurchasePage({super.key});
@@ -44,10 +45,10 @@ class _PrePlantingPurchasePageState
   // === 常量 ===
 
   /// 每份预种价格（USDT）- 从 admin-service 动态获取
-  double _pricePerPortion = 3566.0;
+  double _pricePerPortion = 1887.0;
 
   /// 合并所需份数
-  static const int _portionsPerTree = 5;
+  static const int _portionsPerTree = 10;
 
   /// 定价配置（用于展示下次涨价信息）
   TreePricingConfig? _pricingConfig;
@@ -328,8 +329,8 @@ class _PrePlantingPurchasePageState
   static const String _defaultAgreementText =
       '预种协议\n\n'
       '1. 用户成功购买预种计划后，自动获得分享权。\n'
-      '2. 每一份预种计划，对应享有1棵猫山王榴莲树40%产果分红权的1/5份额，'
-      '即单份预种计划可享受该果树8%的产果分红权。';
+      '2. 每一份预种计划，对应享有1棵猫山王榴莲树40%产果分红权的1/10份额，'
+      '即单份预种计划可享受该果树4%的产果分红权。';
 
   /// 确认购买
   Future<void> _confirmPurchase() async {
@@ -870,7 +871,7 @@ class _PrePlantingPurchasePageState
     );
   }
 
-  /// 合并进度卡片（显示当前 N/5 份的进度）
+  /// 合并进度卡片（显示当前 N/10 份的进度）
   Widget _buildMergeProgressCard() {
     final available = _position!.availablePortions;
     final treesMerged = _position!.totalTreesMerged;
@@ -1385,7 +1386,7 @@ class _PrePlantingPurchasePageState
                   const SizedBox(width: 8),
                   Expanded(
                     child: Text(
-                      '预计涨价: ${_pricingConfig!.nextAutoIncreaseAt!.month}月${_pricingConfig!.nextAutoIncreaseAt!.day}日后每份 +${(_pricingConfig!.autoIncreaseAmount / 5).floor()} 绿积分',
+                      '预计涨价: ${_pricingConfig!.nextAutoIncreaseAt!.month}月${_pricingConfig!.nextAutoIncreaseAt!.day}日后每份 +${(_pricingConfig!.autoIncreaseAmount / _portionsPerTree).floor()} 绿积分',
                       style: const TextStyle(
                         fontSize: 13,
                         fontFamily: 'Inter',
diff --git a/frontend/mobile-app/lib/features/profile/presentation/pages/profile_page.dart b/frontend/mobile-app/lib/features/profile/presentation/pages/profile_page.dart
index 8ac76f1b..134a92a7 100644
--- a/frontend/mobile-app/lib/features/profile/presentation/pages/profile_page.dart
+++ b/frontend/mobile-app/lib/features/profile/presentation/pages/profile_page.dart
@@ -2056,7 +2056,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
   /// [2026-02-17] 构建预种计划按钮行（购买 + 查看持仓）
   ///
   /// 两个按钮并排显示：
-  /// - 左侧「预种购买」：跳转到预种购买页（选择份数 → 支付 3566 USDT/份）
+  /// - 左侧「预种购买」：跳转到预种购买页（选择份数 → 支付 1887 USDT/份）
   /// - 右侧「预种持仓」：跳转到预种持仓页（查看订单、合并记录、签约）
   Widget _buildPrePlantingButtons() {
     return Row(
diff --git a/frontend/mobile-app/lib/routes/app_router.dart b/frontend/mobile-app/lib/routes/app_router.dart
index 96fb6719..8a4a1acc 100644
--- a/frontend/mobile-app/lib/routes/app_router.dart
+++ b/frontend/mobile-app/lib/routes/app_router.dart
@@ -44,7 +44,7 @@ import '../features/kyc/presentation/pages/change_phone_page.dart';
 import '../features/contract_signing/presentation/pages/contract_signing_page.dart';
 import '../features/contract_signing/presentation/pages/pending_contracts_page.dart';
 import '../features/pending_actions/presentation/pages/pending_actions_page.dart';
-// [2026-02-17] 新增：预种计划页面（3566 USDT/份，累计 5 份合成 1 棵树）
+// [2026-02-17] 新增：预种计划页面（1887 USDT/份，累计 10 份合成 1 棵树）
 import '../features/pre_planting/presentation/pages/pre_planting_purchase_page.dart';
 import '../features/pre_planting/presentation/pages/pre_planting_position_page.dart';
 import '../features/pre_planting/presentation/pages/pre_planting_merge_detail_page.dart';