Along with the development of plastics industry, injection mold for plastics to manufacture plastic products has become one of major means.This paper mainly introduces the design method and process of injection mould CHERY's ashtray cover .First introduced the position and function of plastic injection mould design and manufacture in social development process,the plastic products (car's ashtray cover) structure is analyzed,then introduces the specific plastic injection mold design process.Using the theory of knowledge learned to design the specification.Combined with manual drawing die assembly figure, part drawing, injection mould design and manufacturing methods.This injection mold using a mold structure of dual-chamber side core pulling, and using the CAD / CAM 3D graphics software to draw die drawings.In addition, other parts of plastic injection mold for a simple design.Finally, it discussed my experiences after the completion of the design,laying a foundation for my after working in the mould design.