伴随着城市化速度的加快，各种城市问题不断涌现。城市用地紧张、绿化减退、夏季热岛等都是城市中尤为突出的环境问题。为了解决突出的城市环境问题，五花八门的高分子有机环保材料满天飞，这些高分子有机环保材料不但没有从根本上解决问题，反而造成新的污染。鉴于此，本文针对西安市内，以绿色植物五叶地锦绿化后的平屋顶温度、裸露(未绿化)平屋顶温度以及空气温度为研究对象，采用室外实验观察、数据搜集、室内整理分析的方法。总结出三种情况下的24小时逐时温度变化，以及三者之间的关系。 初步结论显示：(一)、从监测的数据发现：经五叶地锦绿化后的屋顶温度日平均值比空气温度日平均值低3.1℃,比裸露屋顶温度日平均值低10.6℃；从舒适性室内温度设计参数发现：五叶地锦绿化后的屋顶室内每天可以提供8小时的舒适性睡眠时间，裸露屋顶室内每天仅提供4小时舒适性睡眠时间，而且高温温度数达13个小时。(二)、通过实验监测发现，经五叶地锦绿化后的屋顶温度低的主要是因为绿色植物在生长过程中产生的蒸腾作用和遮阳作用。 屋顶绿化既能解决城市绿化用地少的问题，又能增加城市绿肺，还能缓解城市热岛等环境问题，是相对更为环保的解决方案。

With the speed of city to speed up the city, various problems have emerged. Particularly environmental problems in the city were Tense city land,Greening loss,Urbanheatislandeffect et al.In order to solve the outstanding urban environmental problems,flying around wide choice of polymer organic eco-friendly materials,these polymeric organic eco-friendly materials not only fails to address the root causes of problems,instead of creating new pollution.For these reasons,the paper,which focused on the XI ' an city,studied the flat roof temperatures greening by Parthenocissus quinquefolia,exposed (not green) flat roof temperatures and air temperatures by the outdoor experimental observation, data collection,laboratory analysis methods,and summaried up the changing temperatures from the three cases of 24 hours,and the relationship between them Preliminary results show: (A) Found from the monitoring data:the flat roof daily average temperature greening by Parthenocissus quinquefolia is lower 3.1℃ than the average air temperature, and is 10.6 ℃ lower than exposed roof temperature; Found from the comfort of the design parameters of the indoor temperature:It,that the house’s flat roof greened by Parthenocissus quinquefolia,is 8 hours to provide comfort sleep time,but the expose roof indoor could provide only 4 hours of comfort sleeping time and 13 hours of high temperature. (B)According to the monitoring experiment: the reasons,that lower temperature of the flat roof greening by Parthenocissus quinquefolia,were the transpiration and shading effect in the process of growth. Greening roof , not only solve the problem of fewer city greening, but also can increase the city green lung, can ease some environmental problems such as Urbanheatislandeffect.It is the relatively more environmentally friendly solutions.