Based on time series data of rural deposits and loans, primary industry output value, per capital net income of rural residents of Hunan Province from 1985 to 2012, this paper makes an empirical test of the relationship among the rural financial scale, agricultural output value and farmers' income using VAR model. The results show that rural financial scale, agricultural output value and farmers' income keep a long-term stability relationship.Among them, the rural savings and rural loan have a one-way causal relationship with farmers' income...