Abstract:The differences in forest structure display significant functions. In two different structured Korean pine stands, the global radiation, reflection, penetrance, biomass, productivity and leaf areas have been analyzed in the eastern mountains of the Northeastern China (N15°23′—26′, E127°36′—39′). It is identified that the productivity and biomass of "doublelayered forest" is higher than that of "singlelayerd forest", even though they grow in the same site, expose to the same enviroment, and receice the same rediation input. The main reason for this is that the doublelayered forest can effectively absorb and ultilize the light energy, highly accumulate organic matter in the stand and vertically distribute relatively large amount of leaf area. Those can attribute to the ratioal structure of doublelayered Korean pine Forest.