diff --git a/backend/mpc-system/services/service-party-app/electron/modules/grpc-client.ts b/backend/mpc-system/services/service-party-app/electron/modules/grpc-client.ts
index 40ce6a99..81b58ca9 100644
--- a/backend/mpc-system/services/service-party-app/electron/modules/grpc-client.ts
+++ b/backend/mpc-system/services/service-party-app/electron/modules/grpc-client.ts
@@ -436,54 +436,13 @@ export class GrpcClient extends EventEmitter {
   }
 
   /**
-   * 加入会话（带重试逻辑）
-   *
-   * 支持重试以处理乐观锁冲突等瞬态错误
+   * 加入会话
    */
   async joinSession(sessionId: string, partyId: string, joinToken: string): Promise<JoinSessionResponse> {
     if (!this.client) {
       throw new Error('Not connected');
     }
 
-    const maxRetries = 3;
-    const baseDelayMs = 500;
-    let lastError: Error | null = null;
-
-    for (let attempt = 1; attempt <= maxRetries; attempt++) {
-      try {
-        const result = await this.doJoinSession(sessionId, partyId, joinToken);
-        return result;
-      } catch (err) {
-        lastError = err as Error;
-        const errorMessage = lastError.message || '';
-
-        // 判断是否为可重试的错误
-        const isRetryable =
-          errorMessage.includes('optimistic lock') ||
-          errorMessage.includes('modified by another transaction') ||
-          errorMessage.includes('UNAVAILABLE') ||
-          errorMessage.includes('DEADLINE_EXCEEDED');
-
-        if (!isRetryable || attempt >= maxRetries) {
-          console.error(`[gRPC] joinSession failed after ${attempt} attempt(s):`, errorMessage);
-          throw lastError;
-        }
-
-        // 计算退避延迟（指数退避 + 随机抖动）
-        const delay = baseDelayMs * Math.pow(2, attempt - 1) + Math.random() * 100;
-        console.log(`[gRPC] joinSession attempt ${attempt}/${maxRetries} failed (${errorMessage}), retrying in ${Math.round(delay)}ms...`);
-
-        await this.sleep(delay);
-      }
-    }
-
-    throw lastError || new Error('joinSession failed after retries');
-  }
-
-  /**
-   * 内部方法：执行单次 joinSession 调用
-   */
-  private doJoinSession(sessionId: string, partyId: string, joinToken: string): Promise<JoinSessionResponse> {
     return new Promise((resolve, reject) => {
       (this.client as grpc.Client & { joinSession: (req: unknown, callback: (err: Error | null, res: JoinSessionResponse) => void) => void })
         .joinSession(
@@ -503,13 +462,6 @@ export class GrpcClient extends EventEmitter {
     });
   }
 
-  /**
-   * 辅助方法：异步等待
-   */
-  private sleep(ms: number): Promise<void> {
-    return new Promise(resolve => setTimeout(resolve, ms));
-  }
-
   /**
    * 订阅会话事件（带自动重连）
    */