Abstract: In this study, the intake grille of a vehicle was taken as the research object, and the pressure, melt temperature and injection time were taken as the injection process parameters to determine the comprehensive warpage deformation value as the experimental measurement index. Intuitive analysis and variance analysis were used to analyze the influence of injection molding process parameters on Warpage deformation, and to judge the significant impact of the interaction between various factors on the index, and to obtain the optimized injection molding process parameters. Moldflow software was used to analyze the deformation of the lower intake grille, and to check whether the process parameters were reasonable.This study provides a theoretical basis for the design and manufacture of intake grids, and has important practical significance.