Calibration device of torque testing machine

The utility model relates to the technical field of torque tests, and provides a calibration device of a torque testing machine, which is convenient for improving the test calibration efficiency, has higher practicability and comprises a box body, a bottom plate is fixedly connected to the top end of the box body, a lower turntable is rotatably connected to the bottom plate through a lower rotating shaft, and a motor is mounted on the box body. The top end of the bottom plate is provided with a top plate through a plurality of supporting rods, the top plate is rotationally connected with a fixing plate through an upper rotating shaft, the fixing plate is provided with a plurality of multi-stage push rods, and output shafts of the multi-stage push rods are provided with an upper rotating disc. Fixing mechanisms are mounted on the upper turntable and the lower turntable, a transmission shaft is rotationally connected between the bottom plate and the top plate, the bottom of the transmission shaft penetrates thr