Based on the statistical data from 2008 to 2014 about Beijing, Shanghai, Tianjin and Guangzhou 4 Cities, per net income of farmers was regarded as explained variable, and the economic growth, fiscal expenditure on agriculture growth, urbanization rate and educational level were regarded as explanatory variables to construct the panel data model. The results showed that three variables, the economic growth, fiscal expenditure on agriculture growth and urbanization rate, had a significant positive role in promoting the per net income growth. Speeding up economic development, strengthening of fiscal expenditure on agriculture investment, promoting the new urbanization strategy should been regarded as the most important means.