Abstract: In Xiashu Forestry Experimental Centre of Nanjing Forestry University, treatments of full illumination,half shade and full shade upon cutting stocks,and of ringing and non-ringing upon tree stems of Chinese fir were assigned, and from which developing bud samples were collected during the spring for analysing the contents of organic components.The results showed that the contents of water-soluble protein in the samples from various treatments were only a little different, and all their contents of chlorophyll were very small,but the contents of water-soluble sugar in the developing buds from the cutting stocks were far lower than those from the terminal buds of lateral shoots within the tree crowns. The sugar content in the developing buds from the cutting stocks did not positively correlate with the intensity of illumination and the temperature at ground surface under various shading treatments; but it decreased with the increase of budding number from the stocks, showing a relation of the power function. With these relationships and also the very low level of the chlorophyll content in the developing buds, it was deemed that the sugar content in the developing buds derived from the earbohydrate storage in the cutting stocks, but not from the photosynthesis of the buds. Therefore to control the budding number from a cutting stock was one of the important measures for obtaining healthy and strong sproutings.