Abstract: PDM technology is one of the fastest developing technologies in CIMS domain in recent years．In this pa· per，the application of PDM in the enterprises of power supply is analyzed and the characteristics of operation management and product data in the enterprises呲studied concretely．It is put forward that the design of product supplying system and the management of equipment is the COre of PDM system in the enterprises of power supply．Integrating frame of PDM system in the enterprises is given in the end．