The snow sublimation process of forest, which includes sublimation and evaporation, is important for the understanding of land surface energy and water balance. It is also a key issue for hydrologic model and regional climate estimation, and to face with the global climate changing and the security of water resources. The research of forest snow sublimation, especially of the broadleaved Korean pine forest in Changbai Mountain, is not enough to consider the impact of composition and structure of forest on snow sublimation. We will make a system study of the snow sublimation process over the broadleaved Korean pine forest in Changbai Mountain, using the measurements of five eddy covariance systems over bare land, 30 years old secondary broadleaved Korean pine forest and natural broadleaved Korean pine forest, three different land use covers, coupling with the simultaneity snow property and the environmental meteorological measurements. The main aim of the study is to reveal the impact machanism of snow redistribution process and snow sublimation process caused by composition and structure of forest, establish a theoretical forest snow sublimation model, considering the impact of forest structure, to make progress on the simulation and prediction of forest snow sublimation process under the background of climate change.