Mongol Scotch Pine(Pinus sylvestris L.var.mongolica Litv.) distributes in the fixed sandy land and semi-fixed sandy land of the east of Hulun Buir Plateau and drainage basin formed by Hailar River,Yimin River and Halakhah River.Mongol Scotch Pine is adaptive to cold,drought and barren environments,with prominent regeneration ability to wind erosion control and shifting sand fixation.The natural regeneration process of Mongol Scotch Pine in sandy land is important to vegetation rehabilitation,degraded ecosystems reconstruction, sustainable sandy ecosystem benefit development,as well as establishment of green ecological barriers in the north of China.From the observation on the seed felling temporal and spatial distribution pattern of Mongol Scotch Pine mature individual plant,results show that seed distribution concentrates around the mother individual plant during the seed falling fastigium,and seed density decreases with the distance increase from the mother plant.The highest seed density exists at the site of 4 m from mother plant,and the seed density in the north and east is significantly higher than that in the west and north.The relationship between seed falling density and mother plant itself characteristics such as tree height and crown diameter is also discussed.The regeneration process of Mongol Scotch Pine has been divided into three stages and four phases.The temporal and spatial model of Mongol Scotch Pine regeneration has been built.