Resistance spot welding system for welding multiple vehicle models

The invention provides a resistance spot welding system for welding multiple vehicle models, and belongs to the technical field of resistance spot welding. The resistance spot welding system comprises a spot welding machine and a spot welding gun. The spot welding machine outputs a plurality of welding control programs for welding different weldment assemblies of a certain vehicle model. The spot welding gun is configured to manually select one of the plurality of welding control programs to weld corresponding weldments. Specifically, the resistance spot welding system also comprises a vehicle model recognition unit for recognizing vehicle model information of a vehicle to be welded; moreover, the spot welding machine is configured to receive the vehicle model information, and select, based on the vehicle model information, a corresponding welding program module from a plurality of welding program modules for sending to the spot welding gun, wherein each welding program module comprises the plurality of weldi