diff --git a/backend/services/identity-service/src/api/api.module.ts b/backend/services/identity-service/src/api/api.module.ts
index ace347a2..1e8f92cc 100644
--- a/backend/services/identity-service/src/api/api.module.ts
+++ b/backend/services/identity-service/src/api/api.module.ts
@@ -2,11 +2,10 @@ import { Module } from '@nestjs/common';
 import { UserAccountController } from './controllers/user-account.controller';
 import { AuthController } from './controllers/auth.controller';
 import { ReferralsController } from './controllers/referrals.controller';
-import { DepositController } from './controllers/deposit.controller';
 import { ApplicationModule } from '@/application/application.module';
 
 @Module({
   imports: [ApplicationModule],
-  controllers: [UserAccountController, AuthController, ReferralsController, DepositController],
+  controllers: [UserAccountController, AuthController, ReferralsController],
 })
 export class ApiModule {}
diff --git a/backend/services/identity-service/src/api/controllers/deposit.controller.ts b/backend/services/identity-service/src/api/controllers/deposit.controller.ts
deleted file mode 100644
index 81276b57..00000000
--- a/backend/services/identity-service/src/api/controllers/deposit.controller.ts
+++ /dev/null
@@ -1,90 +0,0 @@
-import { Controller, Get, UseGuards, Request, Logger } from '@nestjs/common';
-import { ApiTags, ApiOperation, ApiResponse, ApiBearerAuth } from '@nestjs/swagger';
-import { JwtAuthGuard } from '@/shared/guards/jwt-auth.guard';
-import { DepositService } from '@/application/services/deposit.service';
-
-/**
- * 充值地址响应 DTO
- */
-class DepositAddressResponseDto {
-  kavaAddress: string | null;
-  bscAddress: string | null;
-  isValid: boolean;
-  message?: string;
-}
-
-/**
- * USDT 余额响应 DTO
- */
-class UsdtBalanceDto {
-  chainType: string;
-  address: string;
-  balance: string;
-  rawBalance: string;
-  decimals: number;
-}
-
-class BalanceResponseDto {
-  kava: UsdtBalanceDto | null;
-  bsc: UsdtBalanceDto | null;
-}
-
-/**
- * 充值控制器
- *
- * 提供充值地址获取和余额查询 API
- */
-@ApiTags('Deposit')
-@Controller('api/deposit')
-export class DepositController {
-  private readonly logger = new Logger(DepositController.name);
-
-  constructor(private readonly depositService: DepositService) {}
-
-  /**
-   * 获取充值地址
-   *
-   * 返回用户的 KAVA 和 BSC 充值地址
-   * 会验证地址签名，确保地址未被篡改
-   */
-  @Get('addresses')
-  @UseGuards(JwtAuthGuard)
-  @ApiBearerAuth()
-  @ApiOperation({ summary: '获取充值地址' })
-  @ApiResponse({
-    status: 200,
-    description: '成功获取充值地址',
-    type: DepositAddressResponseDto,
-  })
-  @ApiResponse({ status: 400, description: '获取失败' })
-  @ApiResponse({ status: 401, description: '未授权' })
-  async getDepositAddresses(@Request() req: any): Promise<DepositAddressResponseDto> {
-    const userId = req.user.userId;
-    this.logger.log(`获取充值地址: userId=${userId}`);
-
-    return this.depositService.getDepositAddresses(userId);
-  }
-
-  /**
-   * 查询 USDT 余额
-   *
-   * 实时查询 KAVA 和 BSC 链上的 USDT 余额
-   */
-  @Get('balances')
-  @UseGuards(JwtAuthGuard)
-  @ApiBearerAuth()
-  @ApiOperation({ summary: '查询 USDT 余额' })
-  @ApiResponse({
-    status: 200,
-    description: '成功获取余额',
-    type: BalanceResponseDto,
-  })
-  @ApiResponse({ status: 400, description: '查询失败' })
-  @ApiResponse({ status: 401, description: '未授权' })
-  async getUsdtBalances(@Request() req: any): Promise<BalanceResponseDto> {
-    const userId = req.user.userId;
-    this.logger.log(`查询 USDT 余额: userId=${userId}`);
-
-    return this.depositService.getUsdtBalances(userId);
-  }
-}
diff --git a/backend/services/identity-service/src/application/application.module.ts b/backend/services/identity-service/src/application/application.module.ts
index a42644dd..7918f6b0 100644
--- a/backend/services/identity-service/src/application/application.module.ts
+++ b/backend/services/identity-service/src/application/application.module.ts
@@ -1,7 +1,6 @@
 import { Module } from '@nestjs/common';
 import { UserApplicationService } from './services/user-application.service';
 import { TokenService } from './services/token.service';
-import { DepositService } from './services/deposit.service';
 import { AutoCreateAccountHandler } from './commands/auto-create-account/auto-create-account.handler';
 import { RecoverByMnemonicHandler } from './commands/recover-by-mnemonic/recover-by-mnemonic.handler';
 import { RecoverByPhoneHandler } from './commands/recover-by-phone/recover-by-phone.handler';
@@ -18,7 +17,6 @@ import { InfrastructureModule } from '@/infrastructure/infrastructure.module';
   providers: [
     UserApplicationService,
     TokenService,
-    DepositService,
     AutoCreateAccountHandler,
     RecoverByMnemonicHandler,
     RecoverByPhoneHandler,
@@ -33,7 +31,6 @@ import { InfrastructureModule } from '@/infrastructure/infrastructure.module';
   exports: [
     UserApplicationService,
     TokenService,
-    DepositService,
     AutoCreateAccountHandler,
     RecoverByMnemonicHandler,
     RecoverByPhoneHandler,
diff --git a/backend/services/identity-service/src/application/services/deposit.service.ts b/backend/services/identity-service/src/application/services/deposit.service.ts
deleted file mode 100644
index b0c57009..00000000
--- a/backend/services/identity-service/src/application/services/deposit.service.ts
+++ /dev/null
@@ -1,194 +0,0 @@
-import { Injectable, Logger, BadRequestException } from '@nestjs/common';
-import { UserAccountRepositoryImpl } from '@/infrastructure/persistence/repositories/user-account.repository.impl';
-import { BlockchainQueryService, UsdtBalance } from '@/infrastructure/external/blockchain/blockchain-query.service';
-import { UserId, ChainType } from '@/domain/value-objects';
-import { WalletAddress } from '@/domain/entities/wallet-address.entity';
-
-/**
- * 充值地址响应
- */
-export interface DepositAddressResponse {
-  kavaAddress: string | null;
-  bscAddress: string | null;
-  isValid: boolean;
-  message?: string;
-}
-
-/**
- * 余额响应
- */
-export interface BalanceResponse {
-  kava: UsdtBalance | null;
-  bsc: UsdtBalance | null;
-}
-
-/**
- * 充值服务
- *
- * 提供充值地址获取和余额查询功能
- */
-@Injectable()
-export class DepositService {
-  private readonly logger = new Logger(DepositService.name);
-
-  constructor(
-    private readonly userAccountRepository: UserAccountRepositoryImpl,
-    private readonly blockchainQueryService: BlockchainQueryService,
-  ) {}
-
-  /**
-   * 获取用户的充值地址
-   *
-   * 验证地址签名是否有效，防止使用被篡改的地址
-   */
-  async getDepositAddresses(userId: string): Promise<DepositAddressResponse> {
-    this.logger.log(`获取充值地址: userId=${userId}`);
-
-    const userAccount = await this.userAccountRepository.findById(UserId.create(userId));
-    if (!userAccount) {
-      throw new BadRequestException('用户不存在');
-    }
-
-    const walletAddresses = userAccount.getAllWalletAddresses();
-    if (!walletAddresses || walletAddresses.length === 0) {
-      return {
-        kavaAddress: null,
-        bscAddress: null,
-        isValid: false,
-        message: '充值账户异常：未找到钱包地址，请联系客服',
-      };
-    }
-
-    // 查找 KAVA 和 BSC 地址
-    const kavaWallet = walletAddresses.find((w: WalletAddress) => w.chainType === ChainType.KAVA);
-    const bscWallet = walletAddresses.find((w: WalletAddress) => w.chainType === ChainType.BSC);
-
-    // 验证地址签名
-    const validationResults = await Promise.all([
-      kavaWallet ? this.validateWalletAddress(kavaWallet) : Promise.resolve(true),
-      bscWallet ? this.validateWalletAddress(bscWallet) : Promise.resolve(true),
-    ]);
-
-    const [kavaValid, bscValid] = validationResults;
-
-    // 如果有任何一个地址验证失败，返回错误
-    if (!kavaValid || !bscValid) {
-      this.logger.warn(`地址验证失败: userId=${userId}, kavaValid=${kavaValid}, bscValid=${bscValid}`);
-      return {
-        kavaAddress: null,
-        bscAddress: null,
-        isValid: false,
-        message: '充值账户异常：地址验证失败，请重试或联系客服',
-      };
-    }
-
-    // 检查地址状态
-    if (kavaWallet && kavaWallet.status !== 'ACTIVE') {
-      this.logger.warn(`KAVA 地址状态异常: userId=${userId}, status=${kavaWallet.status}`);
-      return {
-        kavaAddress: null,
-        bscAddress: null,
-        isValid: false,
-        message: '充值账户异常：KAVA 地址已禁用，请联系客服',
-      };
-    }
-
-    if (bscWallet && bscWallet.status !== 'ACTIVE') {
-      this.logger.warn(`BSC 地址状态异常: userId=${userId}, status=${bscWallet.status}`);
-      return {
-        kavaAddress: null,
-        bscAddress: null,
-        isValid: false,
-        message: '充值账户异常：BSC 地址已禁用，请联系客服',
-      };
-    }
-
-    return {
-      kavaAddress: kavaWallet?.address || null,
-      bscAddress: bscWallet?.address || null,
-      isValid: true,
-    };
-  }
-
-  /**
-   * 查询用户的 USDT 余额
-   */
-  async getUsdtBalances(userId: string): Promise<BalanceResponse> {
-    this.logger.log(`查询 USDT 余额: userId=${userId}`);
-
-    // 先获取充值地址
-    const depositAddresses = await this.getDepositAddresses(userId);
-
-    if (!depositAddresses.isValid) {
-      throw new BadRequestException(depositAddresses.message || '获取充值地址失败');
-    }
-
-    const results: BalanceResponse = {
-      kava: null,
-      bsc: null,
-    };
-
-    // 查询 KAVA 余额
-    if (depositAddresses.kavaAddress) {
-      try {
-        results.kava = await this.blockchainQueryService.getUsdtBalance(
-          'KAVA',
-          depositAddresses.kavaAddress,
-        );
-      } catch (error) {
-        this.logger.error(`查询 KAVA USDT 余额失败: ${error.message}`);
-        results.kava = {
-          chainType: 'KAVA',
-          address: depositAddresses.kavaAddress,
-          balance: '0',
-          rawBalance: '0',
-          decimals: 6,
-        };
-      }
-    }
-
-    // 查询 BSC 余额
-    if (depositAddresses.bscAddress) {
-      try {
-        results.bsc = await this.blockchainQueryService.getUsdtBalance(
-          'BSC',
-          depositAddresses.bscAddress,
-        );
-      } catch (error) {
-        this.logger.error(`查询 BSC USDT 余额失败: ${error.message}`);
-        results.bsc = {
-          chainType: 'BSC',
-          address: depositAddresses.bscAddress,
-          balance: '0',
-          rawBalance: '0',
-          decimals: 18,
-        };
-      }
-    }
-
-    return results;
-  }
-
-  /**
-   * 验证钱包地址签名
-   */
-  private async validateWalletAddress(wallet: any): Promise<boolean> {
-    try {
-      // 如果没有签名数据 (旧版本创建的地址)，暂时允许通过
-      if (!wallet.publicKey || !wallet.mpcSignature?.r) {
-        this.logger.warn(`钱包地址无签名数据: chainType=${wallet.chainType}`);
-        return true;
-      }
-
-      // 验证签名
-      const isValid = await wallet.verifySignature();
-      if (!isValid) {
-        this.logger.error(`钱包地址签名验证失败: chainType=${wallet.chainType}, address=${wallet.address}`);
-      }
-      return isValid;
-    } catch (error) {
-      this.logger.error(`验证钱包地址签名异常: ${error.message}`);
-      return false;
-    }
-  }
-}
diff --git a/backend/services/identity-service/src/infrastructure/external/blockchain/blockchain-query.service.ts b/backend/services/identity-service/src/infrastructure/external/blockchain/blockchain-query.service.ts
deleted file mode 100644
index 0711a659..00000000
--- a/backend/services/identity-service/src/infrastructure/external/blockchain/blockchain-query.service.ts
+++ /dev/null
@@ -1,167 +0,0 @@
-import { Injectable, Logger } from '@nestjs/common';
-import { HttpService } from '@nestjs/axios';
-import { ConfigService } from '@nestjs/config';
-import { firstValueFrom } from 'rxjs';
-
-/**
- * USDT 余额查询结果
- */
-export interface UsdtBalance {
-  chainType: string;
-  address: string;
-  balance: string;      // 格式化后的余额 (带小数)
-  rawBalance: string;   // 原始余额 (wei)
-  decimals: number;
-}
-
-/**
- * blockchain-service 余额响应
- */
-interface BlockchainBalanceResponse {
-  chainType: string;
-  address: string;
-  usdtBalance: string;
-  nativeBalance: string;
-  nativeSymbol: string;
-}
-
-/**
- * blockchain-service 多链余额响应
- */
-interface BlockchainMultiChainResponse {
-  address: string;
-  balances: BlockchainBalanceResponse[];
-}
-
-/**
- * 区块链查询服务
- *
- * 通过 HTTP 调用 blockchain-service 查询余额
- */
-@Injectable()
-export class BlockchainQueryService {
-  private readonly logger = new Logger(BlockchainQueryService.name);
-  private readonly blockchainServiceUrl: string;
-
-  // 链的 decimals 配置
-  private readonly chainDecimals: Record<string, number> = {
-    KAVA: 6,
-    BSC: 18,
-  };
-
-  constructor(
-    private readonly httpService: HttpService,
-    private readonly configService: ConfigService,
-  ) {
-    this.blockchainServiceUrl = this.configService.get<string>(
-      'BLOCKCHAIN_SERVICE_URL',
-      'http://blockchain-service:3000',
-    );
-    this.logger.log(`BlockchainQueryService initialized, URL: ${this.blockchainServiceUrl}`);
-  }
-
-  /**
-   * 查询单个地址的 USDT 余额
-   *
-   * @param chainType 链类型 (KAVA 或 BSC)
-   * @param address EVM 地址
-   */
-  async getUsdtBalance(chainType: string, address: string): Promise<UsdtBalance> {
-    try {
-      this.logger.debug(`查询 ${chainType} USDT 余额: ${address}`);
-
-      const response = await firstValueFrom(
-        this.httpService.get<BlockchainBalanceResponse>(
-          `${this.blockchainServiceUrl}/balance`,
-          {
-            params: {
-              chainType,
-              address,
-            },
-          },
-        ),
-      );
-
-      const data = response.data;
-      this.logger.debug(`${chainType} USDT 余额: ${data.usdtBalance}`);
-
-      return {
-        chainType: data.chainType,
-        address: data.address,
-        balance: data.usdtBalance,
-        rawBalance: this.toRawBalance(data.usdtBalance, chainType),
-        decimals: this.chainDecimals[chainType] || 6,
-      };
-    } catch (error) {
-      this.logger.error(`查询 ${chainType} USDT 余额失败: ${error.message}`);
-      throw new Error(`查询余额失败: ${error.message}`);
-    }
-  }
-
-  /**
-   * 批量查询多个地址的 USDT 余额
-   *
-   * @param addresses 地址列表 { chainType, address }[]
-   */
-  async getMultipleUsdtBalances(
-    addresses: Array<{ chainType: string; address: string }>,
-  ): Promise<UsdtBalance[]> {
-    const results = await Promise.allSettled(
-      addresses.map(({ chainType, address }) => this.getUsdtBalance(chainType, address)),
-    );
-
-    return results.map((result, index) => {
-      if (result.status === 'fulfilled') {
-        return result.value;
-      }
-      // 失败时返回零余额
-      this.logger.warn(`查询余额失败 [${addresses[index].chainType}:${addresses[index].address}]: ${result.reason}`);
-      return {
-        chainType: addresses[index].chainType,
-        address: addresses[index].address,
-        balance: '0',
-        rawBalance: '0',
-        decimals: this.chainDecimals[addresses[index].chainType] || 6,
-      };
-    });
-  }
-
-  /**
-   * 查询原生代币余额 (KAVA / BNB)
-   */
-  async getNativeBalance(chainType: string, address: string): Promise<string> {
-    try {
-      const response = await firstValueFrom(
-        this.httpService.get<BlockchainBalanceResponse>(
-          `${this.blockchainServiceUrl}/balance`,
-          {
-            params: {
-              chainType,
-              address,
-            },
-          },
-        ),
-      );
-
-      return response.data.nativeBalance;
-    } catch (error) {
-      this.logger.error(`查询 ${chainType} 原生代币余额失败: ${error.message}`);
-      throw new Error(`查询余额失败: ${error.message}`);
-    }
-  }
-
-  /**
-   * 将格式化余额转换为原始余额 (wei)
-   */
-  private toRawBalance(formattedBalance: string, chainType: string): string {
-    try {
-      const decimals = this.chainDecimals[chainType] || 6;
-      const [intPart, decPart = ''] = formattedBalance.split('.');
-      const paddedDecPart = decPart.padEnd(decimals, '0').slice(0, decimals);
-      const rawValue = BigInt(intPart + paddedDecPart);
-      return rawValue.toString();
-    } catch {
-      return '0';
-    }
-  }
-}
diff --git a/backend/services/identity-service/src/infrastructure/infrastructure.module.ts b/backend/services/identity-service/src/infrastructure/infrastructure.module.ts
index fd9fc3de..496ac6f4 100644
--- a/backend/services/identity-service/src/infrastructure/infrastructure.module.ts
+++ b/backend/services/identity-service/src/infrastructure/infrastructure.module.ts
@@ -1,6 +1,5 @@
 import { Module, Global } from '@nestjs/common';
 import { HttpModule } from '@nestjs/axios';
-import { ConfigModule } from '@nestjs/config';
 import { PrismaService } from './persistence/prisma/prisma.service';
 import { UserAccountRepositoryImpl } from './persistence/repositories/user-account.repository.impl';
 import { MpcKeyShareRepositoryImpl } from './persistence/repositories/mpc-key-share.repository.impl';
@@ -10,7 +9,6 @@ import { EventPublisherService } from './kafka/event-publisher.service';
 import { MpcEventConsumerService } from './kafka/mpc-event-consumer.service';
 import { SmsService } from './external/sms/sms.service';
 import { WalletGeneratorServiceImpl } from './external/blockchain/wallet-generator.service.impl';
-import { BlockchainQueryService } from './external/blockchain/blockchain-query.service';
 import { MpcClientService, MpcWalletService } from './external/mpc';
 import { MPC_KEY_SHARE_REPOSITORY } from '@/domain/repositories/mpc-key-share.repository.interface';
 import { WalletGeneratorService } from '@/domain/services/wallet-generator.service';
@@ -18,7 +16,6 @@ import { WalletGeneratorService } from '@/domain/services/wallet-generator.servi
 @Global()
 @Module({
   imports: [
-    ConfigModule,
     HttpModule.register({
       timeout: 300000,
       maxRedirects: 5,
@@ -42,7 +39,6 @@ import { WalletGeneratorService } from '@/domain/services/wallet-generator.servi
       provide: WalletGeneratorService,
       useExisting: WalletGeneratorServiceImpl,
     },
-    BlockchainQueryService,
     MpcClientService,
     MpcWalletService,
   ],
@@ -60,7 +56,6 @@ import { WalletGeneratorService } from '@/domain/services/wallet-generator.servi
     SmsService,
     WalletGeneratorServiceImpl,
     WalletGeneratorService,
-    BlockchainQueryService,
     MpcClientService,
     MpcWalletService,
   ],