The front cover is designed as a five-hole Jack mode, which makes rational use of space resources, is flexible, convenient and economical. In order to reduce the production cost of arranging and inserting, the production mode of injection moulding process is adopted in production. Injection moulding process is an important means of rapid production of complex structural products and to ensure their quality. In the design process of injection mould for the front cover of row insertion, the dimension structure of the injection mould is analyzed firstly, and then the structure of each part of the injection mould is designed, simulated, opened and closed by using CAD and Proe design software.