diff --git a/backend/mpc-system/services/service-party-app/electron/main.ts b/backend/mpc-system/services/service-party-app/electron/main.ts
index 35d0c941..f6c80c82 100644
--- a/backend/mpc-system/services/service-party-app/electron/main.ts
+++ b/backend/mpc-system/services/service-party-app/electron/main.ts
@@ -14,7 +14,9 @@ import { TSSHandler, MockTSSHandler, KeygenResult } from './modules/tss-handler'
 const HTTP_PORT = 3456;
 
 // 是否使用 Mock TSS Handler (开发模式)
-const USE_MOCK_TSS = process.env.USE_MOCK_TSS === 'true' || process.env.NODE_ENV === 'development';
+// 注意：即使是开发模式，默认也使用真实的 TSS Handler
+// 只有显式设置 USE_MOCK_TSS=true 才会使用 Mock Handler
+const USE_MOCK_TSS = process.env.USE_MOCK_TSS === 'true';
 
 // ===========================================================================
 // 调试日志系统