Abstract: On the basis of the data of the 7th National Forest Inventory,and according to the Code of Forest Harvesting and so on,the area and age class structures of 18 dominant tree species are adjusted through the Mathematical model. According to the results,Logistic growth model has high regression precision of volume and year factors,Adjusted R Square(R²) is 0.985,and Richard growth model has high regression precision of normal harvesting and year factors,Adjusted R Square(R²) is 0.985 . After adjustment,Accumulation of forest is 300 million m³,reasonable harvesting is about 7.5 billion m³in China.

Key words: forest resources stock, rational harvest, mathematical model, adjustment and yield