Abstract: The structural manufacturability of the outside handle cap of right front door was analyzed, and the critical technical points and design ideas of the key mechanism of injection mould were introduced. According to the product structure, the gating system, forming parts, ejection mechanism, side core-pulling mechanism and cooling system of this mould are designed. In particular, the two-stage slide core-pulling mechanism is used to reasonably solve the technological problems in forming and core-pulling of the inclined holes. The mould is compact in structure and reliable in action, which can provide a reference for the design of injection moulds with a similar structure.