The invention provides a heating type electromagnetic rivet-free connecting device and a working method. The connecting device comprises a fixed frame. A puncher pin drive device is arranged on the upper portion of the fixed frame, and a rivet mold is arranged on the lower portion of the fixed frame. An induction heating coil capable of heating to-be-connected workpieces through the eddy current effect is arranged on the rivet mold. The puncher pin drive device comprises an electromagnetic induction coil and a driver connected with a puncher pin and provided with a metal structure. The electromagnetic induction coil is adjacent to or connected with the metal structure of the driver. When the electromagnetic induction coil works, the induced current capable of forming a mutual exclusion magnetic field is induced by an alternating magnetic field formed by powering on the electromagnetic induction coil on the metal structure of the driver, the electromagnetic induction coil pushes the driver to move downwards through electromagnetic repulsive force, and the puncher pin is driven to impact on the two heated to-be-connected metal workpieces on the rivet mold so that the to-be-connectedmetal workpieces can be connected. Through the principle of electromagnetic induction heating, preheating of two kinds of to-be-connected metal is achieved, electromagnetic force is used as drive forso that the two kinds of to-be-connected metal workpieces can generate deformation to achieve one-time punching forming, and the forming effect is improved.