In order to improve design efficiency and product quality of watches, the architecture of a watch digital design platform was proposed. System integration technologies were researched. The design knowledge database and the functional modules of fast design templates were developed. Based on the commercial softwares, such as TDPLM, UG NX60, AutoCAD, Office, a watch digital design platform was developed by using Visual Studio2008 and other tools. The platform has been used in enterprise. And the watch product development efficiency is greatly improved.