The cooling problem of Plastic Dustbin Mould is very important. Reasonable cooling design can reduce the deformation of the product and shorten the injection cycle. The proper diameter and even arrangement of the waterway can ensure the complete and even cooling of the mold. In the process of processing, because of the large size of the Plastic Dustbin Mould, one needs to use deep hole drilling to do the processing, and the water test after the processing to ensure that every waterway is unobstructed.