diff --git a/datamock.py b/datamock.py
index 7ad703d..b7e8a6d 100644
--- a/datamock.py
+++ b/datamock.py
@@ -1,6 +1,7 @@
 import zmq
 import numpy as np
 import time
+import threading
 from datetime import datetime
 
 # ========== 参数配置 ==========
@@ -65,6 +66,28 @@ def main():
     sock.connect(SERVER_ADDR)
     print(f"[{datetime.now().strftime('%H:%M:%S')}] ZMQ Dealer 连接到 {SERVER_ADDR}")
 
+    # 后台消费线程：持续 recv 从 ROUTER 返回的数据，避免 server 发送队列积压
+    recv_count = [0]
+    stop_recv = threading.Event()
+
+    def consumer_thread():
+        """消费线程：阻塞 recv，丢弃收到的数据，仅用于清空 ROUTER 发送队列"""
+        while not stop_recv.is_set():
+            try:
+                frames = sock.recv_multipart(zmq.NOBLOCK)
+                recv_count[0] += 1
+                # 收到的格式: [identity, '', filtered_data_bytes]
+                if recv_count[0] % 500 == 0:
+                    print(f"[{datetime.now().strftime('%H:%M:%S')}] 消费线程已丢弃 {recv_count[0]} 帧滤波数据")
+            except zmq.Again:
+                time.sleep(0.01)
+            except zmq.error.Again:  # 兼容旧版
+                time.sleep(0.01)
+
+    consumer = threading.Thread(target=consumer_thread, daemon=True)
+    consumer.start()
+    print(f"[{datetime.now().strftime('%H:%M:%S')}] 消费线程已启动（daemon）")
+
     global_sample_idx = 0       # 全局采样点计数器
     label_type = 1              # 当前标签类型: 1 或 2
     label1_count = 0            # label=1 的序号计数器
@@ -109,6 +132,7 @@ def main():
             # 发送: multipart 3帧 [identity, '', data]
             # 使用标准格式（3帧），ROUTER 会自动附加 ZMQ 分配的客户端身份
             sock.send_multipart([
+                b'',
                 packet.tobytes()
             ])
 
@@ -129,6 +153,8 @@ def main():
     except KeyboardInterrupt:
         print(f"\n[{datetime.now().strftime('%H:%M:%S')}] 停止发送，共发送 {packet_count} 包")
     finally:
+        stop_recv.set()
+        consumer.join(timeout=2)
         sock.close()
         ctx.term()