Abstract: Root systems and above ground biomasses of 33 Chinese fir sample trees were studied. Results showed that the distribution of Chinese fir roots depend on soil bulk density and system of cultivation. The root of Chinese fir is aerobic and intolerent to waterlogging. It prefers fertile soil but is weak in competition with other plants.The regression equations Showing the relationsbip between root biomass (w) and the tree height (H) and the relationsbip between the underground and the above-ground ratio (y) and the tree height (H) have been established as follow:w=3.4601.3686y = 0-3067 + 3.5321 logH.