Abstract: Using the data from three stages of 1?026 permanent plots, models of high degree polynominal are set up to analyse dynamics of spatial distribution of biomass of forest landscape in Lin′an from 1983 to 1994. Analyzing results revealed that from 1983 to 1994, the maximum value of biomass decreased rapidly, the variance of biomass along the scale of each environment factor became remarkably smaller, the location of maximum point shifted from the mountain of middle altitude to the higher place, from the area with middle level slopes to gentle places, from mountain area with the poor transport condition to relatively developed plains or hills.