The climate in the last 2 000 years has been highlighted in the field of global change. Ximen Cuo(33°23'N, 101°08'E)is a modern glacial lake. The core sampled at the lake bay (XM9201) havS a depth of 1.47m. The AMS radiocarbon on the organic mud at 1.4m deep is dated at 2 600±120aB. P. Meanwhile the radionuclide measurement suggests that the sedimentary rate is about 0.68mm/a, coinciding with the depositional rate inferred from UC data. Therefore.the sample at the interval of 2cm has a resolution of 30-40 yr. According to the synthetic analysis on all kinds of pigments.the study suggests that the Ximen Cuo (lake), lying in the eastern Tibetan Plateau, has undergone a climatic evolution something like that of historical record in East China, especially the climatic events.such as "MeclivenI Warm Period", "Little Glacial" etc,, but unlike the ice core record in Tibetan Plateau. This paper has also probed into the characteristics of the different events. The study indicates that limnological study is also an effective tool to research on the hisorical climate, especially in the areas where there are no suitable materials for historical climate research such as historical documents.tree-ring, ice-core, etc.