From the principle and structure design and analysis of wholesale zippers, we can find some chain tooth size match the slider’s size of data, is to use a mathematical model to accurately express chain tooth and the head of the relationship between the two, this is the design formula of the tooth head and chain. This is an important leap in the design of empirical design to the precise design of products.In the current zipper industry, no enterprise can provide a design formula for zipper size and Angle to guide the design and manufacture of zippers. During our production process and the use of the zipper, all errors and quality problems occurred because of the basic principle and design rules of the zipper.