Abstract. In this paper, the relationship between the structure of agricultural industry and the income of farmers in Yunnan province is studied by using cointegration test, impulse function and variance decomposition. The paper constructs the econometric model to show the dynamic equilibrium relationship among the per capita net income of farmers, agriculture, forestry, animal husbandry and fishery output. The results show that the impact of animal husbandry on the per capita income of farmers in Yunnan is the largest, followed by forestry and fishery. Impulse response analysis shows that forestry is the fastest response to farmers' income. Variance decomposition shows that the forestry is the largest contribution to farmers' income, followed by farming and fisheries, the contribution of animal husbandry is the smallest.