Planning can guide the construction of the modern agricultural demonstration zone(MASZ) in high level. A scientific guiding theories system may smooth the process of the planning and its appliance. Based on the characters of the modern agriculture, we try to establish such theory system by summing up relevant theories using the hierarchical classification method. This theory system includes theories about site setting, development definition, general arrangement, industry development, location, industry planning, science & technology supporting, profit analysis, innovation of the mechanism, etc. The overall design is an important part of the MASZ planning, which mainly summed and integrated the basic theories about development definition, location, industry planning. In guiding the development definition, there are mainly theories about the basic role of agriculture and about multi-functions of agriculture. In guiding the general arrangement, there are theories about system engineering and recycle agriculture. In guiding the industry development, there are theories about major industry choosing, industry chain, industry construction. In guiding location, there are theories of growth pole, core&axis, agriculture districts division. The practice of this guiding theories system is showed in the case of The Planning of the Agriculture Demonstration Zone of Haikou City. In this planning, we defined the function of Haikou MASZ by considering such factors as strengthening the local industries, efficiently supplying of vegetables, developing low-coal agriculture, leading zone development, improving the international competing advantage, attracting tourists, etc. According to theory of system, we designed a positive cycle system, in which, agriculture products processing is as engine, technology innovation is support factor, social agriculture service is associate factor, all industries react and coordinate well. The major industries were chosen according factors as resources, scale of industries, market, technology level, industrialization level, profit and sustainability, etc. According to the theory of districts division, the zone was divided into three cores, three belts, four zones and five parks.% 规划是现代农业示范区建设的顶层设计，构建系统而科学的理论指导体系，有利于顺利编制和实施规划。该文从现代农业特征出发，通过梳理国内外众多现代农业发展相关理论，采用层次分类法构建现代农业示范区规划理论指导体系。针对示范区规划重要的总体方案设计环节，采用主次分析法重点梳理与集成了发展定位、总体统筹、空间布局、产业发展等相关基础理论。以《海口市国家现代农业示范区规划》为例，分析了理论指导下的现代农业示范区规划实践。该研究可为各地现代农业示范区规划提供借鉴与参考。
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