Based on the design of a razor shell,through analyzing the structural characteristics of the product,the structure of one mold with two cavities and multiple oblique complex extractor cores in the moving and fixed molds is designed,and the mold flow analysis software is used to simulate the filling,pressure holding and cooling process of the product.It is found that the mold structure is reasonably designed,the opening and closing action is accurate and reliable,there is no interference between multiple oblique extractor cores,the product forming surface quality is better,which can meet the customer's demand,and the mold structure is novel,which can provide reference value for the same kind of design.