Abstract:Anthrone colorimetry is applied to detect the suger content from the trunk base of Chinese pine under the various intensity of leaf-fall．The result shows that Chinese pine has the ability of compensation and super compensation to the defoliation of artificial simulantion and natural endangerment resulted from pine caterpillar．With more needle loss of 2-3yrs old leaves，the normal growth of annual needles relies on the stored nutritional from the trunk base of Chinese pine．Even if there are in tensive losses of 2-3yrs old leaves for 3years,the chinese pine doesn’t come to die and keeps natural growth．