在居民膳食结构转型、全球极端天气频发、国际地缘冲突加剧的新形势下，树立大食物观、重视并发挥草地的食物供给功能是提升我国食物安全保障能力和水平的重要依托，因而探讨发展草地农业以保障我国食物安全成为亟需。本文以定性、定量分析相结合的方式，讨论了新形势下发展草地农业的重要价值，阐述了典型国家草地农业发展态势以及对我国的发展启示，进一步测算了我国草地农业对食物安全的贡献潜力。研究认为，天然草原的优质畜产品供给潜力较大，草地农业可强化传统农区食物安全保障功能，农牧交错区将是草食家畜产品的主要生产基地，南方地区是草地农业发展的优势地区。为此建议：加大牧区草原修复力度，合理利用长期禁牧草原；将饲草作为重要作物，加强草类植物育种；发展放牧型栽培草地，缓解天然草地生产压力；优化养殖业结构，发展节粮型草食家畜养殖业；因地制宜“藏粮于草”，增强草地食物供给能力。

Considering the new situation of dietary structure transformation, frequent extreme weathers, and intensified international geopolitical conflicts, China needs to adopt an all-encompassing approach to food and exploit the food supply function of grassland agriculture to comprehensively improve its capability to ensure food security. Using qualitative and quantitative analysis, this study demonstrates the great value of developing grassland agriculture under the new situation, explores the trend of grassland agriculture development in typical countries, and summarizes its implications to China; furthermore, it evaluates the potential contribution of grassland agriculture to food security in China. The results show that rangeland has a great potential for providing high-quality livestock products and grassland agriculture can guarantee food security in rural areas. The agro-pastoral ecotones will be the major production bases for grassland-based livestock products and South China has dominant advantages in developing grassland agriculture. Therefore, we recommend to (1) strengthen rangeland restoration while rationally utilizing long-term grazing-prohibition rangelands, (2) regard forage as important as grain crop while strengthening grass breeding, (3) develop cultivated grasslands for gazing to relieve pressure on rangelands, (4) optimize the structure of livestock husbandry by promoting grain-saving grassland livestock husbandry, and (5) implement the strategy of "storing grain productivity in grassland" according to local conditions to enhance the food supply capacity of grassland.