Abstract: In the production of power cable intermediate joint, the conductor connecting pipe crimped by hydraulic pliers is easy to have defects such as tight crimping, burrs on the surface, impurities between crimping surfaces, etc., which will lead to large contact resistance or partial discharge of the joint, and then damage the joint. The electromagnetic pulse forming technology has the advantages of tight crimping and no indentation. Therefore, the optimal design rules of forming coil and magnetic collector are obtained by simulation, and a set of electromagnetic forming equipment is built based on it. The electromagnetic crimping of GT–G–70 copper connecting pipe and aluminum strand is studied. The results show that the surface of the copper pipe crimped by electromagnetic pulse forming technology is smooth without burrs from the appearance; the copper pipe is tightly wrapped on the aluminum strand from the cross-section, and the core of the aluminum strand is also tightly bonded; from the SEM image of the crimping interface, there is the interface morphology similar to the microwave connection interface of solid-phase welding. To sum up, the copper joint pipe crimped by electromagnetic pulse forming technology has better surface smoothness and crimping tightness than that by hydraulic tong.