After milk melamine incident, the domestic demand for high-quality milk increased dramatically. Alfalfa as "the king of grass", and the alfalfa industry as "the first workshop of the milk production" caught more attention. Meanwhile it also led again to the thinking of how to develop the domestic pasture industry. Based on the perspective of the national food security and comprehensive efficiency, this paper focuses on the alfalfa industry development influence on grain and food security under the exploration of essential connotation of grain security as well as the necessary condition for dairy industry quality improve- ment. The paper also puts forward its own views and opinions on how to improve alfalfa industry with a reference for the development of the alfalfa and dairy industry.%“三聚氰胺”事件后，国内对于优质奶产品的需求骤升，苜蓿（Medicagospp．）作为“牧草之王”，苜蓿产业作为“牛奶生产的第一车间”，愈加受到人们的关注。同时，也又一次引发人们对国内牧草产业如何发展的思考。本研究基于国家粮食安全和综合效益的视角下，在探讨粮食安全和食物安全的实质内涵以及奶产业素质提升的必要条件的基础上，重点实证分析了苜蓿产业发展对粮食安全的影响，并就未来如何发展苜蓿产业提出了自己的看法和见解，以期为我国苜蓿产业和奶业的发展提供参考。
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