Abstract: Inter-vehicle jumper cables are critical to vehicle reliability. Starting from the installation interface of the vehicle jumper cables, this paper first introduces the jumper cable solution for the electric coupler box at the car end of a standard metro vehicle. A force analysis of the car-end jumper cables is conducted, and a mounting scheme for the cable clamps at the car end is proposed. By securing the jumper cables with clamps, the forces at the fixed points at both ends of the cables are reduced, thereby extending the service life of the cables. Subsequently, various motion states of the standard metro vehicle are analyzed, and a calculation method for the jumper cable length in engineering design is described. The theoretical value of the jumper cable length is then obtained through three-dimensional simulation calculations.