在地理信息系统（ＧＩＳ）支持下，以Ｏｖｅｒｌａｙ模型得出的土地资源单位为评价单元，以二次开发的主成分模型、层次分析模型和综合评价模型为方法，以土壤类型、土层厚度、土壤有机质含量、土壤ｐＨ值、土壤速效硼含量、海拔高程、坡度为评价因素，评价得出南丰县土地资源中蜜桔种植适宜一等地有１２７８３．０３ｈｍ２，二等地有２６８４４．３６ｈｍ２，三等地有４２８５３．５１ｈｍ２。 Under the support of Geographic Information System (GIS), the unit of land resources based on Overlay model is the evaluation unit, and the principal component model, AHP and comprehensive evaluation model of secondary development are used as evaluation methods. The soil types, soil thickness, Soil organic matter content, soil pH value, soil available boron content, elevation and slope were the evaluation factors. It was concluded that there were 12783.03hm2 first-class land for citrus cultivation in Nanfeng County, 26844.36hm2 second-class land, There are 42853.51hm2 other places.