The temperature control system of the injection mold is a key factor that affects the molding quality and molding cycle of plastic parts. Improper layout of the mold cooling system will cause uneven cooling of the plastic parts, resulting in defects such as deformation, warpage, and thermal stress. The design of the mold's cooling system is related to the choice of cooling medium and cooling method. Water has a large heat capacity and is low in price, and it is a commonly used cooling medium. The cooling time occupies 80% of the entire molding cycle. It is very necessary to arrange the cooling water channel reasonably to improve the cooling efficiency and shorten the cooling time.