The community of Pinus sylvestris var. mongolica, Picea meyeri, Pinus tabulaeformis, Suringa oblate, Cornus alba were choosen in forest garden of Forestry Science research institute and east area of Agriculture University in Inner Mongolia. By using PC-2 solar radiation sensors, the UV-radiation value was calculated. The UV-screening efficiency was compared with. And using the Pearon correlation analysis method, the correlation between UV-screening effect to related characteristics, such as community struct...