Property right law is the basic law for China to confirm property,utilize property and pro- tect property.The main role of property right law is to solve debate and make use of the property as much as possible.In order to give the role of property right law full play,China's Property Right Law uses real right legal doctrine principle,however,real right legal doctrine principle has its limitation and should be moderated or softened so as to accord with the development trends of property right in the world and to solve new problems in the process of the implementation of China's Property Right Law.