【英文摘要】The research finished according to the project. The main Results were: 1) Completed the investigation of the vegetation, the plant community and the lake drainage area，and sampling in study area. 2) Statistical analysis was used to study the 1953-2005 meteorological data, the natural disasters and the human activities in study area, drew several maps about the geomorphology and vegetation (plant community), documented the daily mean wind speed and wind-blown sand activity changes in temporal and spatial. 3) The dating of sediments from the key was inferred based on a variety of index, sedimentation rates was determined, the pollen assemblage and deposition fluxes nearly 50 to 100 years was revealed. The relationship between high-resolution (2 yrs) pollen record, and vegetation and climate in temporal scales, and human impact on the natural environment was documented. And the records showed the vegetation (plant community) and wind-blown sand activity can be influence by the human activities, and the wind-blown sand activity can be interference by vegetation cover. 4) Exposited the surface pollen assemblages in the forest island (Xinglong, Luoshan, Liupan Mountains and so on) and the surrounding area (10-80 km range), and discussed the pollen dispersal and pollen representation in study area. The main conclusions were: ① Most vegetation (plant community) can be characterized by a distinctive modern pollen assemblages; ② the dispersal distance of Picea and Pinus pollen by wind is shorter than some previous study; ③ The higher percentages(about 10-20%) of Poaceae pollen may be found in areas where the natural vegetation is better preserved. Furthermore, it could be expected the environment changes sequence in inter-annual resolution between 50 and 200 yrs, if we will research in the further.