Abstract: Taking the electromagnetic pulse crimping of copper terminals/aluminum wire harnesses as the research object, the process of high-speed impact of copper terminals on aluminum wire harnesses was simulated using the LS-DYNA software, and the variation laws of magnetic field, structural field and collision velocity were obtained. The results show that the simulation result of the deformation rate of the crimping of copper terminals/aluminum wire harnesses is 22.3%, and the measured result is 19.12%. Moreover, the simulation result of plastic deformation is consistent with the variation law of the test data, indicating that the finite element model and loading conditions are effective. When the induced current of the copper terminal reaches its maximum value, the collision speed is in an accelerated state. During the crimping process, the copper terminal collides with the aluminum wire harnesses before the collision speed accelerates, converting more kinetic energy into plastic strain energy and increasing the deformation shrinkage. The maximum Vickers hardness of the copper terminal is 159.54 HV, and that of the aluminum wire harnesses is 46.28 HV. Both are located opposite the opening of the magnetic collector and are at the position with the greatest electromagnetic force. The strong magnetic force causes the material to undergo high plastic deformation and hardening. The tensile strength of the crimping joint is 79 MPa, and the failure location is at the aluminum wire harnesses. The tensile performance of the crimping joint is superior to that of the aluminum wire harnesses. The research results provide data reference for the electromagnetic pulse crimping of wire harnesses.