The institutional reform of land property rights is confronted with various challenges from all aspects of the economicand social lives in thecurrent stage .The original property reform theory does not agree with the current practical requirement of land use and management .How to fully reflect the political,social,organizational and juristic nature of land property right in the newly-formed concepts of land property reform and its institutional innovation,and further provide a trajectory for future reforms in China,are the main purposes of our theoretical research . It needs to combine together the theories of economics and sociology to analyze related issues .The four-level-social-analysis framework proposed by Williamson provides a good logic to link property right with resource allocation,sociology with economics . Through such a logic,a comprehensive analysis on the nature and the assessment of Chinese land propertycan be achieved,whichcanfurther provide a theoretical basis for the trajectory choice of the current land property reform .The analysis offers scientific references for the new-round of land property reformin China .