diff --git a/apps/em/cd.py b/apps/em/cd.py
index cfa76a31..88714562 100644
--- a/apps/em/cd.py
+++ b/apps/em/cd.py
@@ -148,6 +148,15 @@ def get_tyy_data(*args):
                 sc.settimeout(5)  # 设置超时
                 sc.connect((host, port))
                 sc_all[f"{host}_{port}"] = sc
+            else:
+                # 清空接收缓冲区
+                sc.settimeout(0.1)  # 设置短暂超时
+                try:
+                    while True:
+                        sc.recv(1024)
+                except (socket.timeout, BlockingIOError):
+                    pass
+                sc.settimeout(5)  # 恢复原超时设置
             sc.sendall(b"R")
         except BrokenPipeError:
             if retry > 0: