Abstract: Based on analyses of several environmental proxies such as magnetic susceptibility, grain size and carbonate content, the authors discuss the environment change at the Qangze section in the Zanda basin, Tibet, from 2.68 to 1.36 Ma. The climate of the Qangze section became dry and cold gradually after the Guge movement at 2.68 /Via. After about 1.81 Ma, the Tertiary paleolake in the Zanda basin discharged southward features and evolution indicated by the three above-mentioned and sporopoUen and also the uplift of the Himalayas. via the Xiangquan River and was drained. The environmental environmental proxies have good correspondence with ostracods