Abstract: By analyzing stem of Larix olgensis Henry, we analyzed their growing process. So we discussed the time of fostering and logging. It can provide the theory for forest management and harvest in future. The result indicated: the peak value of current annual diameter increment will appear at age 16-19 and that of the average annual increment will appear at age 8-10. The two curves will intersect at age 16-18;The peak value of tree height current annual increment will appear at age 14-17 and after the annual increment's will appear. The two curves will intersect at age18-20; The peak value of volume current annual increment will appear at age 25-30 and that of the annual increment will appear. The two curves will intersect at age 18-20. Then it will descend year by year. The curve of volume current annual increment and annual increment will intersect at age 28-33. Our research shows we can foster Larix olgensis Henry forest by thinning probably at age 18,and harvest and cut trees probably at age 28 to 33 according to the local management targets.Simultaneously,with the diameter classes increasing, the growth rule of tree diameter,tree height and tree volume will approach the general tree growth rule. The superior diameter growth equation is y=1.2546e^0.1247x and the tree height growth equation is y=1.4187e^0.1193x, The tree volume growth equation is y=0.00009e^0.3644x.

Key words: Larix olgensis Henry, artificial forest, growing process, stem analysis