Objective To reduce the weight of lift truck's chassis of NC warehouse and guarantee its structural strength to meet the requirements. Finite element was used to simulate the performance of lift truck's chassis. Methods Solidworks 2010 software was used to create the 3D model of Lifting truck's chassis of NC warehouse, and then Ansys software workbench was introduced for finite element analysis of structural strength. According to the results, the model was modified until the structural strength met the requirements. Results Different force and deformation were obtained by changing the thickness and structure of the Lifting truck's chassis, and the test results were analyzed and optimized. Conclusion After increasing the stiffener, not only the structural strength of the chassis with 4mm thickness met the requirements,but its quality was also reduced by 20. 01 kg as compared to the chassis with 5mm thickness,which saved materials and improved the overall performance of the system.