The tusi system is a political system in which the feudal dynasties of the Yuan, Ming and Qing Dynasties conferred hereditary official positions on ethnic leaders in some ethnic minority areas in order to rule the original areas and people. This system has been implemented in the southwest, south and northwest minority areas, especially in the southwest minority areas. Tusi system is the feudal dynasty to rule the people, "the barbarians to control the barbarians" to carry out the product of national oppression. The Yuan Dynasty successively granted the leaders of various ethnic groups with the official positions of envoys, envoys, pacifiers, envoys, governors, etc., and set up native officials in the roads, prefectures, prefectures and counties inhabited by various ethnic groups. In the Ming Dynasty, the feudal dynasties generally added the word "Tu" to the official positions conferred on the leaders of the ethnic minorities, such as Tu Zhifu, Tu Zhizhou, Tu Zhixian, etc. The remote areas of the provinces were established differently from the remote areas of the provinces in terms of the number of officials. The remote areas of the provinces to establish different from the hinterland of the Tusi area, such as Xuanwu Si, Xuanfu Si, Pacification Si and so on. The chiefs of most of the ethnic minorities who were officials were generally called tusi (土司). The native posts in the tusi system actually included two categories of native officials and tusi. The land was owned by the Tugongs, who distributed the land to their miners on a per capita basis, and the miners paid rent and taxes to the Tugongs every year and performed hard labor. They were feudal lords and had all kinds of privileges, except for the tribute and levies imposed on the central government. Tusi system belongs to the category of feudal lord peace economy, its initial level of development of local productive forces with some adaptation, the Ming and Qing dynasties, due to its centralized system of feudalism and centralized system of the feudal state to produce sharp contradictions, and gradually be dismantled.