Abstract: 12 national forestry farm’s Chinese fir manmade forest of low mountain and hilly land in the southeast of Anhui province is investigated. Site quality is quantitatively evaluated by Analytic Hierarchy Process (AHP) and the quantitative results coincide with the actual conditions. Having analysed the relation of site factors and yield, every mathematical prediction models of standing stock, stand height and breast—height diameter are established through SAS software and the models combined organically with stand age,stand density and site index in order to provide the reliable guide of the region’s site quality quantitative evaluation and yield prediction.