The resources of society are being wasted and evenhanded competitions of market are being influenced due to the access doorsill of property management market, the good and bad intermingled numerous enterprises, serious losses of industry and working monopoly of developer. The paper analyze the reasons of the whole industry with the theory of industrial organization and Salop, S. model from access of property management market, and point out government must enhance market access condition of property management and the market access doorsill due to the perfect amount of enterprises in the market is half in free ingoing market from the maximal welfare.