Abstract: On the basis of investigating the artificial Larix kaemopferi forest, Richards function H=a(1-e^-bA)^c was taken for its dominant height growth model on condition that the baseline age was twenty years and the scale map was drawn up to evaluate the site index table of haditat quality.The effects of some habitat factors on woods were directly found by seeking woods with the same site index in site index table and decomposing environmental factors to draw out dominant height growth curve of woods and the habitat quality was more dynamically evaluated by site index table.