[Objective] The agricultural ecological security of Huaihua City, Hu'nan Province was evaluated in order to provide scientific support for promoting the healthy and sustainable development of agriculture in Huaihua City.[Methods] The evaluation index system of agricultural ecological security was constructed based on the PSR index framework, the combination weight of evaluation indexes was determined by game theory, and the evaluation model of agricultural ecological security was established based on extension cloud model. Taking the agricultural ecosystem of Huaihua City as an example, the agricultural ecological security situation of Huaihua City from 2010 to 2019 was comprehensively evaluated.[Results] The agricultural ecosystem of Huaihua City changed from "relatively safe" state to "safe" state, and the security level increased, but the overall security level needed to be further improved.[Conclusion] In order to further improve the agricultural ecological security of Huaihua City, it is necessary to reduce the energy consumption per unit GDP, build agricultural water conservancy facilities, increase land output level, increase farmers' income, reduce the Engel coefficient of rural residents, and optimize the rural living environment to promote the healthy, safe and sustainable development of Huaihua agricultural ecosystem.