The saline lake-Dahyab Tso (Taicuo) located in northern Tibetan Plateau was chosen as a study object. The environment around Dahyab Tso is primitive, and has not suffered any pollution. Field work was carried out in 2001. Samples were collected along the 369-cm-long Profile TT-1 in a high consistency, and the average thickness of each sample has been limited within 2.36cm. Based on the mineral distribution and assemblage of authigenic carbonate in profile TT-1, the geochemical characteristics of saline elements, and the credible dating data by Uranium-series chronology method, the paper reconstructed the paleoclimate and paleoenvironment from the Late Pleistocene to Middle Holocene of Dahyab Tso (Taicuo) in Tibet. By the ten-thousand timescales, two changing stages in climate took place in the Dahyab Tso area. The climate at 6.45ka from >32.6 kaBP to 26.15 kaBP was generally humid and warm, and from 26.15 kaBP to 4.50 kaBP, the climate was generally slightly dry and cold during 21.65ka. After 4.50 kaBP, missing of the upper part of the profile results in interruption of saline lake sedimentary record, indicating the lake was dried up. This study describes in great detail 16 changing stages in Dahyab Tso from 32.60 kaBP to 4.50 kaBP in the hundred-thousand timescale and reconstructed a complete evolution of a lake from the flush to the end: from a pan-lake in flush stage, to mature stage characterized by salinizing and shoaling gradually, and finally to the salty lake from the lake, which was accompanied by water-level falling and drying rot.