In-situ equivalent test system and test method for friction and movement of ball

The invention discloses an in-situ equivalent test system and test method for friction and movement of a ball, belongs to the technical field of ball screw test, and solves the technical problem that the rotation or revolution speed of the ball and the friction coefficient of a contact surface cannot be measured in the prior art. The device comprises a case, a driving mechanism arranged in the case, and a loading assembly and a ball motion image acquisition assembly which are respectively connected with the case, the loading assembly comprises a driving disc, a feeding loading module, a transparent loading disc arranged above the driving disc and a torque sensor connected with the transparent loading disc, an annular roller path is arranged between the upper end face of the driving disc and the lower end face of the transparent loading disc, and balls are placed in the annular roller path. The in-situ equivalent test system and the in-situ equivalent test method for ball friction and motion can be better used