Superconducting cable lap length determination method and device and superconducting cable

The invention relates to a superconducting cable lap length determination method and device, a superconducting cable, computer equipment, a computer readable storage medium and a computer program product, and the method comprises the steps: obtaining the branch resistance of each superconducting strip in the superconducting cable, obtaining the current-sharing resistance according to the branch resistance of each superconducting strip and a preset lap resistance, and according to the current-sharing resistance and the branch resistance of each superconducting tape, obtaining the target lap length of each superconducting tape. Wherein the preset lap joint resistance represents the welding resistance of the superconducting tape and the welding piece, and the target lap joint length represents the welding length of each superconducting tape and the welding piece. By adopting the method, the superconductive tapes and the welding parts in the superconductive cable can be lapped based on the obtained lapping length