Abstract
Agroecological security is an important part of ecological security. Exploring the coupled and coordinated relationship between agroecological security and rural green development is of great strategic importance for sustainable economic and social development. This study takes 31 provinces (autonomous regions and municipalities directly under the central government) in China from 2011 to 2021 as the research object and constructs an index system of agroecological security and rural green development. On this basis, the comprehensive evaluation index of agroecological security and rural green development is measured using the coefficient of variation method, the synergistic evolutionary relationship between the two is quantitatively analyzed using the coupled coordination model, the spatial distribution and evolution characteristics are analyzed using spatial autocorrelation method, and the barrier factors are diagnosed via combination with the barrier degree model. The research results show that the coupled coordination type of agroecological security and rural green development is the primarily coordinated agroecological security lag type, the spatial clustering effect is relatively weak, and the coupled coordination relationship needs to be further improved. The local financial expenditures on agriculture, forestry and water affairs per unit of GDP, the ratio of flood-removing area, and the ratio of soil erosion control have always been the greatest barriers to China's agroecological security and rural green development. The results of this study help to compensate for the lack of research on the coupling and coordination of agroecological security and rural green development, and provide a reference for exploring the benign coordination and interaction between agroecological security and rural green development.