Automatic mounting device for elevator guide rail connecting piece and using method of automatic mounting device

The invention relates to the technical field of guide rail connecting pieces, in particular to an automatic mounting device for elevator guide rail connecting pieces and a using method of the automatic mounting device. The device comprises a construction frame, a detection assembly, a placement frame and a pushing assembly. Magnetic blocks can generate magnetism after being electrified, magnetic force is generated between the magnetic blocks and the embedded iron, under the action of the magnetic force, the two magnetic blocks drive the elevator guide rail connecting piece at the bottommost end to move in parallel along the bottom end position of the placement frame through a pushing assembly till the end of the elevator guide rail connecting piece is attached to the side face of the embedded iron, and at the moment, a lifting table is stopped; under the action of the pushing assembly, pushing force is applied to the elevator guide rail connecting piece, the end installation position of the elevator guide rai