Abstract: This article introduces a method for parameterized model design of chiller heat exchangers in the air conditioning industry. Through a rapid design tool based on Creo secondary development, the three-dimensional models of key module such as the cylinder and water box can be quickly created and modified, making it easier for designers to parameterize product models. This greatly improves the efficiency, accuracy, standardization, and convenience of model adjustment in future. This article can provide a fast and convenient design method and approach for the development of similar chiller product.