Abstract: Shovel bucket design mainly uses the traditional mechanics calculation,the external force often applied by the distributed load , the digging resistance mainly adopts the digging resistance calculation formula . This method easily lead to bucket strength and structure design flaws. Taking the WK-20 excavator bucket as the research , using SolidWorks modeling the bucket, import the model to Hypermesh for pre-treatment, and then simulate the bucket mining process with the discrete element software edem, and get the external load which closer to the actual condition , combined with the finite element software Patran, the simulation results are applied to the bucket corresponding unit, By using the Nastran solver to get the stress nephogram and deformation of the bucket，provide reliable data for the structure design and optimization of the bucket, and also provide a good design and optimization scheme for other components and mechanicals.