diff --git a/robomaster_pi/conn_vel.py b/robomaster_pi/conn_vel.py
index 33af9684e8a6eb6d2a8e1b8a5be036c960fb8808..24b3777a83ad5ca1af20c41b0dff4e31f3a41d02 100644
--- a/robomaster_pi/conn_vel.py
+++ b/robomaster_pi/conn_vel.py
@@ -10,7 +10,6 @@ from geometry_msgs.msg import TransformStamped
 from geometry_msgs.msg import Twist
 from tf2_ros import TransformBroadcaster
 import os
-import timer
 
 from rclpy.node import Node