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农业生态工程数学模型的任务在于提供对于系统现状及其功能、结构的认识 ,并用于预测系统即将发生的行为 ,进一步外加某种措施 ,对系统实施控制 ,以求达到它的最优化.文章通过理论研究和实践试验 ,建立了小型农业生态工程的数学模型.并以北京市大兴县留民营村一家农户为例 ,介绍小型农业生态工程的数学模型 ,及其在指导实际建设中的应用“,”Mathematic model of agricultural eco engineering is to provide the knowledge of system's present situation,function and structure.The model is also used in the forecast system for something that is about to happen and taking an additional measure to control the system for achieving the system optimization.Based on theoetic study and practice,a mathematic model of small sized agricultural eco engineering has been established. Taking a farmer's family in Liuminying Village of Daxing County,Beijing,as an example,the paper introduces the mathematic model of small sized agricultural eco engineering and its application in practice. [