Abstract: The developement and achievement of forest site classification in China since the liberation in 1949 were reviewed in respect of the combined approach,environment approach and environment-site index approach.Discussion was conducted as to what's the difference between the concept of site classification and site evaluation,what's site classification in relation to forest land category and tree species as well as relationship between regional and local differentiation.With analysis,the developing trend of forest site classification system and its application in forestry were pointed out.