Abstract: The key and difficult point of promoting the development of urbanization in Yunnan is to solve the problem of migrant workers' citizenship, and the key to solve the problem of migrant workers' urbanization is to solve the various problems in the transition period. The number of migrant workers in Yunnan is relatively large, and it is very important to study the cost calculation and sharing mechanism of the migrant workers in Yunnan. This thesis is based on field survey, using mathematical methods, analyzing the characteristics of the cost of migrant workers in Yunnan Province, the cost of migrant workers in province, the private cost and public cost of migrant workers in Yunnan Province, and it puts forward the cost sharing mechanism and financing channels for Yunnan Province, to provide scientific basis for the orderly development of urbanization in Yunnan province.