It should be noted that it is necessary and imperative for Injection Moulding Processing Ltd. to indicate on the drawings of the injection moulded parts the requirements for the appearance of the injection moulded parts, which are based on the pattern, dimensional accuracy and technical requirements. Although the appearance of the injection moulded part does not affect the performance of the injection moulded part, it can affect the surface aesthetics of the injection moulded part and thus the sales and value of the injection moulded part. So far, there are no rigid requirements for the drawings of injection moulded parts, but there must be technical requirements for the appearance of injection moulded parts. Then, the injection mould designer can only analyse the specific application of the injection moulded part to start with. In our life and production, but any shape that can be seen or touched by hand is not allowed to have traces of mould design moulding present. The analysis of this technical requirement is called the analysis of the appearance of the injection moulded part. So far, the designers of injection moulded parts have not been in the habit of marking the appearance requirements on the drawings of injection moulded parts, and there are no relevant documents in the field or in the enterprises. However, the appearance of plastic injection moulds is one of the factors that affect the structure of the injection mould, which adds to the difficulty of the design of the injection mould.