Urban structure and land-use type significantly influence the habitat of ancient and rare trees. In order to clarify the relationship between ancient and rare trees and urban structure, species composition, age,DBH, height, crown-width and land-use type of the ancient and rare trees in Songjiang district of Shanghai were investigated. The results showed that in Songjiang district, Ginkgo biloba and Zelkova serrata are nearly half of the investigated 219 ancient and rare trees, and 95% of them are native trees. Among 11 kinds of land-using types,the number of ancient trees in forest land,public facility,school land and green land are larger than other land-use types. Age and DBH in religion land, public facility and green land are comparatively greater. Crown-width in public facility and green land are larger. Height in forest land is the greatest,but crown-width is relatively smaller. Based on the varying degrees of influence on the ancient and rare trees,the land-use types are divided into three groups to scientifically guide the regional conservation of ancient and rare trees in the process of urban planning and urban construction.%城市结构、土地利用类型是影响古树名木生境条件的重要因素,为研究古树名木与城市结构之间的关系,作者调查了上海市松江区古树名木的种类组成、树龄、胸径、高度、冠幅及土地利用类型.结果表明,调查共记录松江区古树名木219棵,银杏、榉树占总数的一半,乡土树种占95％；11种土地利用类型中,林地、公共设施用地、学校及绿地中的古树数量较多,宗教、公共设施用地和绿地中树龄、胸径较大,公共设施用地、绿地中冠幅较大,林地中高度最大,但冠幅较小；根据对古树名木影响程度的不同,将土地利用类型分为了3类,为城市规划建设中古树名木的分区保护提供科学依据.
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