This paper aims to analyze the drop simulation of the embedded dishwasher packaging, to further reduce the solution cost, and finally obtain a lightweight design theory that is consistent with production. The joint simulation was conducted by Hyperworks/LS-Dyna. Firstly, the response of the package to the six-sided drop of working conditions was simulated. Secondly, OptiStruct optimization module was used to have topological optimization on the design of the bottom pad. Optimal working conditions were reasonably set according to the deformation of the pad. Manufacturing constraints were added to the pad to obtain the lightest weight solution that met the test requirements. The manufacturability of the optimized results was enhanced, the cost of the final solution was reduced by 1.1 yuan, and the acceleration response of the vulnerable part collected in the test before and after the optimization was reduced to varying degrees, which was in line with the optimization goal. Light weight design theory is universal in packaging. After the design is completed, the technical route of topology optimization can be used to realize cost decreasing and benefit increasing.