diff --git a/src/ui/main_window.py b/src/ui/main_window.py
index b0d5a22..6efbda6 100644
--- a/src/ui/main_window.py
+++ b/src/ui/main_window.py
@@ -915,7 +915,6 @@ def send_data(self):
 
         if self.serial_manager.send_text(text, fmt):
             self.sent_bytes += len(text.encode('utf-8'))
-            self.send_input.clear()
 
             # 日志记录
             self.log_writer.write_tx(text.encode('utf-8'), self.hex_send_check.isChecked())