The evaluation of the modified soil to the stream of the Ming and Qing Dynasties,since twentieth Century80’s discussion is an immense number of books,some viewpoints which has become the academic circles. The author thinks:the chieftain system is a product of social structure of the feudal lords of change; the nation’s internal economic and social structure is the motivation of Tusi system collapse; the opposite of Tusi system toward its lead to accelerated its collapse.Was observed by the view of sociology, soil improvement in the Ming and Qing Dynasties to the stream is a regional political system reform. The chieftain system as a special management system of a kind of regional,prosperity,decline,the process of collapse,which is reflected in such a unified multi-ethnic country,in the social management pattern,from rough to the system, from the legal system is not perfect, to start a process of feudal legal system perfect the. For the vast territory,numerous nationalities,such a gap in the region of the country,the history of the rulers to find a way to develop,is not easy,and will give a variety of price. This is what we in the evaluation of land reform,an important aspect not to notice.