Fatigue testing device of door

The utility model provides a fatigue testing device of a door. The door comprises a door frame, a door body connected to the door frame in a hinged mode and a plate spring arranged on the door body, the plate spring comprises a first end, a plate spring body and a second end which are sequentially connected, the first end is connected with the door body, and the second end is a free end; the fatigue testing device comprises: a chassis; the supporting piece is arranged on one side of the bottom frame, and the door frame is arranged on the supporting piece; the motor is arranged on the bottom frame; the driving mechanism is arranged on the bottom frame, the motor drives the driving mechanism to move, the driving mechanism is connected with the door body so that the door body can rotate relative to the door frame to be switched between the opening position and the closing position, and the second end can abut against the supporting piece in a matched mode; a wire is arranged in the detection loop, the motor is c