Abstract: The deep drawing process of stainless steel sink with large round corners was researched by numerical simulation, and the influence of different drawing parameters on the forming quality was revealed, so as to obtain better process parameters and provide guidance for practical production.The finite element numerical simulation software Dynaform was used to simulate the deep drawing forming process of rectangular box, and the influence of blank holder force, die clearance and friction coefficient on the forming of rectangular flume with large rounded corners was analyzed. The control variable method was used to optimize the process parameters by combining the forming limit diagram, thickness variation diagram and material flow diagram.The results show that according to the numerical simulation and process optimization, the optimal process parameters are obtained: the first-sequence blank holder force is 500 kN, the second-sequence blank holder force is 1000 kN, the die clearance is 1.1 t, and the friction coefficient is 0.125.Qualified products can be produced by using the technology scheme, and the thinning rate and forming quality of the actual formed parts are basically consistent with the simulation results. Through finite element numerical simulation, the thinning of large round corner of stainless steel sink in deep drawing process can be predicted, and the influence of forming parameters on the workpiece can provide references for the study of deep drawing of the sink with large round corner.