Abstract:In the product life cycle,NX master model is a digital geometry model which can guide and ensure data sharing and data global consistency. The master model is a central database file which takes product data management as the core.Taking three-dimensional model as single data source, according to the design principles for master model of NX software,the parallel development method of product in Product Data Management(PDM) system is discussed. Its effectiveness is validated through a specific design example, and it can improve the efficiency and quality of the mould design.