Abstract:The indicative species (masson pine) in the forest land of researched region(Yun county)as objective species and regarding altitude,gradient ect eight factors as theindependent variable used for establishing the model,We have worked out the site indexand site type tables .They were provided foundation for forest land's managenent,and agood result was obtained when those tables were used for the general planning ofcostruction fo the Yangtze river basin's protection forest of Yun county.