China's grain production increases constantly, and it faces the"ceiling effect"of production cost, production resource constraints and the problem of pollution causes excessive pesticide chemical fertilizer input, which has brought new challenges for the implementation of the strategy of food security. As for food production, since 2003, it had achieved "twelve straight increases" and reached 600 million tons, but food security still had its challenge. Food production resource constraints, the rising domestic demand diversification and sustained high food complex situation, such as international trade dependency, high-cost system constraints, and domestic demand growth were the main situations. Therefore, analyses of the successive increase in grain production under the background of the challenges in food security strategy were inevitable. Finally, according to the respective challenges, putting forward the stability of cultivated land, the rise of investment, trade, science and technology, demand differentiation, agricultural subsidies, grain logistics warehousing system, etc. were proposed to the current challenge of food security.%我国粮食生产连年增产，但还需克服生产成本“天花板效应”、生产资源约束及农药化肥投入超标造成的污染问题，粮食安全战略实施面临新挑战。2003年至今我国粮食生产实现“十二连增”，产量突破6亿吨，但我国粮食安全问题依然存在隐忧。面对粮食生产资源约束、国内需求多元化程度不断提升以及持续较高的粮食国际贸易依存度等复杂形势，从国内粮食体制约束、粮食生产高成本与国内粮食需求增长三方面，分析粮食连年增产背景下我国粮食安全战略面临的挑战。最后，根据我国粮食安全面临的挑战，提出稳耕地、增投入、科技带动、分化贸易与需求、加大农业补贴、构建高效粮食物流仓储体系等对策建议。
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