In order to efficiently and accurately evaluate the friction torque of the jet vane's manipulator under the laboratory conditions， a test system for the friction torque of the jet vane shaft bearing is designed. On this basis， a test system for the friction torque of the manipulator is further built to fully simulate the actual installation state of the jet vane system， and then a test method for the friction torque is proposed， the variation trend of the key bearings friction torque with the load and overload coefficient are revealed， and the key factors affecting the friction torque of the manipulator are explored. The test results show that the test system provides a reasonable test method for accurately obtaining the friction torque. The friction torque of the key bearings of the rudder shaft increases with the rise of the load and overload coefficient， and the bearing friction torque plays a leading role in the friction torque of the manipulator.