Tension testing device for circuit board

The utility model provides a tension testing device for a circuit board, which relates to the technical field of circuit boards and comprises an outer frame, an output motor is mounted at the top end of the outer frame, a winding reel is fixedly connected to the rear end of the output motor, a tension rope is wound on the outer wall of the winding reel, and the bottom end of the tension rope is inserted into the outer frame. The bottom end of the pull rope is fixedly connected with a connecting plate, the bottom end of the connecting plate is fixedly connected with a spring, the bottom end of the spring is fixedly connected with a pull plate, clamping mechanisms are arranged on the inner wall of the bottom end of the outer frame and the lower surface of the pull plate, each clamping mechanism comprises a supporting plate, and the top end of the outer frame is fixedly connected with two supporting plates. The right end of the supporting plate on the left side is in bearing connection with a first threaded rod,