Abstract: Forest land quality assessment is an important aspect of forest land management.Chengkou county of Chongqing was taken as the assessment sample in this paper.Based on the forest management planning and design inventory data in Chengkou county,Masson Pine which was distributed more widely was selected as standard species.Masson Pine subcompartment site indexes were calculated.All forest land subcompartment site indexes were calculated by regression.All forest land subcompartment site indexes were treated as fertility indexes.Estimation per unit area in all forest land subcomparments were treated as productivity indexes.Traffic from all subcompartments was treated as regional indexes.All forest land subcompartment quality scores were calculated comprehensively according to fertility score,score of estimation per unit area and traffic location score.Thus forest land quality of all subcompartments was classificatied,and forest land quality assessment in Chengkou county was completed.Forest land quality in Chengkou county was divided into five quality grades,includingfirst-class area accounted for 5.5%,the second-class area accounted for 40.1%,third-class accounted for 39.1%,fourth-class area accounted for 13.6%,fifth-class area accounted for 1.7%.Thus differentiated forest land management policies were made in Chengkou county,and forest management and utilization ways relative to forest land quality grades will be implemented.

Key words: forest land quality grade, forest land quality assessment, Chengkou county