The conditions of agricultural infrastructure determine the future development of China's agriculture. In the past, agricultural infrastructure projects used financial funds as the main source of funds, but agricultural infrastructure projects have high costs, long cycles, and limited financial funds, resulting in an increasingly serious funding gap. The introduction of the PPP model in the construction of agricultural infrastructure can change this status quo. This mode of cooperation between the government and social capital can reduce the government's financial burden, increase the efficiency of capital use, and accelerate the realization of China's "agricultural modernization" strategy. In the study of the application of PPP mode in agricultural infrastructure construction projects, it is found that there are difficulties in the government, market and project, and this paper will find solutions to these three difficulties.