Abstract: Model, mechanism, and path of financial support for development of facility agriculture were studied．Based on statistical yearbook data of Ningdu County, Jiangxi Province from 2004 to 2022, OLS regression was first used to explore impact of year-end loan balance on agricultural output value in Ningdu County．Fiscal revenue was used as an intermediary variable to examine whether year-end loan balance has an impact on agricultural output value, using stepwise coefficient regression, Sobel test, and Bootstrap test, respectively．Results indicated that increase in year-end loan balance has a positive effect on agricultural output value．For every unit increase in year-end loan balance, agricultural output value increases by 11.47%, and fiscal revenue also has a positive mediating effect．