Abstract: The traditional simulation calculation method was improved,the annual forest allowable cut quota for commercial category was calculated based on the forest sub-compartment database of Dongsheng Farm,Lushuihe Bureau and the dynamic changing of forest resources was simulated.The results showed that after 30 years of harvesting,the proportion of area of mature forest and over-mature forest to the total commercial category increased from 41.62% to 42.02%,the mature forest area would rise significantly and the over-mature forest area would significantly be reduced,which meant the forest resources structure was optimized.After the first 5 years harvesting,the total commercial forest stock increased from 189.14×10⁴m³ to 193.29×10⁴ m³,and stock per hectare increased from 134.85 m³ to 137.80 m³ and the forest resource consumption was lower than the growth.The reasonable harvest area in the first 5 years was 182.42ha/a and the rational logging stock was 3.59×10⁴m³/a,which can be regarded as a reference for adjusting the cutting quota in the 12th Five-Year period.

Key words: forest harvesting, rational annual forest yield, cutting quota, simulating calculation method