The bucket, as an important working and load-bearing part of the excavator, is in direct contact with the material and is subject to more severe wear than the rest of the equipment. In order to investigate the force situation of the bucket under different working conditions and its structural analysis and light-weight design ideas, a 3D geometric model of the bucket is established by UG software, and the structural statics of the bucket is calculated by ANSYS Workbench software based on the finite element method, and at the same time, uses sensitivity analysis to find out the parts that have the greatest influence on the quality of the bucket, and uses them as design variables to determine the influence parameters of the optimization target were determined.The response surface optimization method was used to optimize the structural dimensions to achieve the light-weight design. The research results show that:(1) the maximum stresses of the bucket under typical working conditions are mainly distributed at the edge plate, teeth and side plate, which are consistent with the feedback results of field failure cases of this bucket; (2) Among various design variables, the results of sensitivity analysis show that the ear plate, edge plate, side plate and clamp plate have the greatest influence on the overall mass of the bucket, and the edge plate has the greatest influence on the maximum deformation; (3) among the four typical working conditions, the results of light-weight design are similar, with a mass reduction ranging from 2% to 4%, and the overall goal of light-weight design of the bucket structure is achieved, which provides a theoretical basis and reference for the subsequent structural design and optimization analysis of new bucket products.

挖掘机；挖斗优化；轻量化设计；有限元分析；响应面优化