To solve the one hundred million people urbanization in Chinese central and western regions is a key problem of urbanization in the new period. Guizhou，located in the western region，is the key to solve this problem. To ensure the problem is solved smoothly，the premise is to estimate the upper limit cost of Guizhou Province Peasants citizenization. Undoubtedly，Guiyang City is the best sample in the whole province peasant citizenization ceiling. As soon as Guiyang achieves development，the province’s problems will be smoothly solved. Based on the above information，as well as summarizing and drawing lessons from the existing literature which split the cost of the peasants citizenization into basic government cost and private cost，we add a new essential factor：the cost of the enterprise. By using statistical methods，this article calculates the cost of the peasant citizenization according to the different types of people and different areas. At the same time，it predicts the following ten years of Guiyang citizenization population and cost，and presents some policy recommendations including selecting population through industry，guiding old town population evacuation through equalizing public services and establishing the dynamic monitoring system for peasants’ citizenization.