diff --git a/robomaster_pi/conn_vel.py b/robomaster_pi/conn_vel.py
index 72fecb61d7bdb26883066e750aa5c5c095da2b8b..72f091aa6e0c1d3ae0de229266421c1681da5836 100644
--- a/robomaster_pi/conn_vel.py
+++ b/robomaster_pi/conn_vel.py
@@ -57,7 +57,7 @@ class vel_from_ros_node(Node):
         if(msg.angular.z == 0.0 and msg.linear.x == 0.0 and msg.linear.y == 0.0):
             self.my_ep_chassis.drive_speed(x = 0, y = 0, z = 0.5)
         else:
-            self.my_ep_chassis.drive_speed(x = msg.linear.x, y = -msg.linear.y, z = -msg.angular.z)
+            self.my_ep_chassis.drive_speed(x = msg.linear.x, y = -msg.linear.y, z = msg.angular.z)
 
 def main():
     ep_robot = robot.Robot()