PPP is a cooperative model in which the government and social capital sign cooperation agreements to jointly complete projects such as public infrastructure construction, achieving the dual purpose of providing public services by the government and achieving profitability through social capital. In recent years, the development of PPP in China has been very rapid, and PPP has become one of the effective models to support infrastructure development in China. It has been widely used in fields such as highways and municipal construction, but its application in agriculture is not yet widespread. The article summarizes the experience and existing problems in the construction process of agricultural infrastructure PPP water-saving irrigation projects in Yuanmou County, Chuxiong Prefecture, Yunnan Province through a case analysis. In the future, the government should introduce relevant policies to provide more favorable conditions for enterprises, innovate return mechanisms, improve investment structures, stimulate the enthusiasm of social capital investment, strengthen supervision, improve relevant laws and regulations, regulate the operation of PPP projects in the agricultural field, and further attract social capital to actively participate in the construction of PPP projects in the agricultural field.