Abstract The structural performance analysis and solder joint strength evaluation of spot-welded stainless-steel vehicles are associated with many working conditions, significant data, and repeated work. This will help researchers evaluate and improve calculation efficiency quickly. Taking the body structure of a spot-welded stainless-steel vehicle as the research object, this study conducted a finite element simulation analysis of its stiffness, static strength, mode, fatigue strength, and solder joint strength by the EN12663 standard. A rapid evaluation system for the solder joint strength was developed. The results showed that the performance of the vehicle body under various working conditions can meet the design requirements, and the evaluation results of the solder joint strength confirm the practicability and rapidity of the system, which can provide technical support for the subsequent improvement and optimization of vehicle body structures.