Laser cutting has been widely used in the manufacturing process of front wheel shock absorber packages for all Changan Ford models. However, due to the complexity of the manufacturing process and numerous influencing factors, in order to meet the quality requirements, stable production, the kerf quality is assessed by the dross height and the fraction of oblique striation zone of the lower part of kerf, and the effects of process parameters such as laser power, cutting speed, defocusing distance and assistant gas pressure on the kerf quality are systematically investigated. And use the method of objective optimization to optimize the model. The results show that the laser power 3 408 W, cutting speed 43.1 mm/s, defocusing distance -3.27 mm can get the best kerf quality. The study provides the basis for process commissioning and quality optimization for the launch of new models.