Speed reducer mounting and positioning device

The utility model relates to the technical field of speed reducers, in particular to a speed reducer mounting and positioning device which comprises a bearing platform, a motor fixing seat and a speed reducer fixing platform. The motor fixing seat is erected on the bearing platform; a supporting frame is mounted on the bearing platform; a supporting plate and a lifting assembly connected with the supporting plate are arranged on the supporting frame, and the lifting assembly is used for driving the supporting plate to ascend and descend in the vertical direction; a moving assembly connected with the speed reducer fixing platform is arranged on the supporting plate. The speed reducer installing and positioning device has the advantages that the vertical position and the horizontal position of the speed reducer are adjusted through the lifting assembly and the moving assembly respectively, so that rapid positioning of a shaft head of the speed reducer and an output shaft of a standard motor is guaranteed, a cou