Improving agricultural green development (AGD) has become an urgent choice for developing countries to achieve sustainable development and ensure food security. High standard farmland construction (HSFC) has improved agricultural production conditions and ecological environment through artificial improvement of farmland facilities. This study aims to evaluate the role of high standard farmland construction policy in improving agricultural green development. Based on data of rural areas in Hunan, China, this study explores quantitative impacts of HSFC on AGD by difference-in-difference model. T...