Abstract: Pinus tabulaeformis is one of the important reserve forest resourcesin Liaoning Province. From 1973 to 1983,a remarkable result of the intermediate cuttings has been achieved by the fixed-position observation.The volume of standing,crops has been increased by 15—30%,the stand diameter has been expanded by 25%,the matured timer rate has been boosted by 20%,the mature period has been shortened to 10—15% years,and the economic income has been raised by 20—25%. This research also puts forward a mode of quantitatively intermediate cuttings and its theory of "Three-Factor Control" in the intermetiate cuttings procedure of comprehensive reaction;the precision of the ready-made Managing Chart is over 98% (Over 95% for that of inspection).