Auxiliary device for stress detection of steel structure

The utility model discloses an auxiliary device for stress detection of a steel structure, which comprises a bottom plate, the bottom surface of the bottom plate is fixedly connected with a motor, the output end of the motor is fixedly connected with a first belt pulley, the upper surface of the bottom plate is fixedly embedded with two bearings, the inner ring of each bearing is fixedly connected with a threaded rod, and the threaded rod is fixedly connected with a second belt pulley. The bottom end of each threaded rod is fixedly connected with a second belt wheel, the outer surfaces of the two second belt wheels and the outer surface of the first belt wheel are jointly sleeved with a connecting belt, two pressing plates are arranged above the bottom plate, and two threaded holes are formed in the upper surfaces of the pressing plates. Through cooperation of a motor, a threaded rod and a threaded hole, when the motor works, two second belt wheels can drive the threaded rod to rotate through a connecting bel