Abstract: Based on orthogonal experiments, the injection molding of automobile light lens made of PC was simulated with Moldflow software. The effect of injection molding parameters including melt temperature, mold temperature, injection time, packing pressure, and packing time on the warpage deformation of the lens were analyzed systematically, and the optimum process parameters were obtained. The amount of warpage deformation of the lens was greatly decreasing when the injection molding was simulated with the optimum parameters.