Electromagnetic force load-bearing chest expanding and back-to-back tugging machine

The invention discloses an electromagnetic force load-bearing chest expanding and back-to-back tugging machine, which comprises a supporting frame, a drag chain, a pull ring, a steel wire rope, a conductor, a touch controller, a stepping motor and a pulley. A magnet block is arranged in the supporting frame, and the conductor is under the effect of magnetic field force in a magnetic field of the magnet block; and the conductor is connected with a resistance adjusting device, and the magnitude of resistance of the resistance adjusting device is controlled to control the magnitude of a current in the conductor so as to control the magnitude of generated electromagnetic force to adjust the magnitude of needed load-bearing force. According to the electromagnetic force load-bearing chest expanding and back-to-back tugging machine, balance weights are omitted, thus the weight is decreased, universal wheels and fixing feet are arranged, thus moving and fixing are convenient, and the magnetic field generated by a mag