Abstract: Based on the data of forest resources inventory in Sichuan Province for five consecutive times (in the year 1988, 1992, 2002, 2002 and 2007), the area of different forest types were analyzed statistically together with the accumulation changes of nearly 20 years. According to the present situation of forest distribution (tree species, forest age, origin, etc.), and forestry managementation and implementation of major forestry projects, the classification of biomass modeling was divided into 16 species (groups) by survey samples and wood scaling information from continuous investigation of Sichuan forest resources. The distribution range of DBH, altitude, longitude and latitude of the samples were determined on the basis of biomass survey, which could provide a scientific reference for the systematic study of wood biomass models in Sichuan.