Abstract: Based on the allmetric method and quadrat-harvesting method, the standing crop of biomass of the Korean pine plantation in the east moun-tain areas of Northeast China was determined and discussed in the pres-ent paper. The results are as follows: The total biomass of Korean pine commun-ity was 132.419 t/ha, in which the biomass of tree layer, undergrowth layer, herb layer, litter and standing dead was 106.881 t/ha, 0.517 t/ha, 0.292 t/ha, 20.411 t/ha and 4.328 t/ha respectively, the percentage of each component to the total biomass was 80.71%, 0.38%, 0.22%, 15.41% and 3.28% respectively Based on the analysis of distrbution structure of the biomass in korean pine community, tending felling must be conducted urgentyly in Korean pine:plantation so as to regulate the structure of production and improve the integrate effect of the community.