In order to better play the role of agricultural engineering in ensuring food security, this article analyzes the different contributions of various branches of agricultural engineering, and proposes key directions for the development of agricultural engineering in China according to the constraints of resources, environment, and ecology faced by food production in China. The contributions of various branches of agricultural engineering in ensuring food security are as follows: agricultural mechanization improves labor production efficiency and ensures the planting area of grain; agricultural soil and water engineering ensures the safety of soil and water resources; land consolidation engineering ensures the quantity and quality of cultivated land; agricultural biological environmental engineering implements intensive production without competing with grain for land; rural energy and environmental engineering reduces environmental pollution; agricultural product processing engineering reduces grain loss and seed processing increases grain production. The key development directions of agricultural engineering technology are as follows： playing a comprehensive and collaborative role in promoting the construction of high standard farmland, improving the level of agricultural mechanization and informatization, improving agricultural product processing technology, promoting seed industry engineering, developing ecological agricultural engineering, and improving farmland infrastructure construction. Food security is a comprehensive project, and the coordinated implementation of agricultural engineering technology can provide technical support and necessary guarantees for China's food security.

agricultural engineering  /  food security  /  agricultural machinery  /  agricultural water and soil engineering  /  land consolidation engineering  /  agricultural product processing engineering  /  high standard farmland  /  ecological agricultural engineering