Abstract: Planation surface, erosion surface, fluvial terrace and other step like geomorphic surfaces in the Qinghai Xizang Plateau and its surrounding mountains were formed by long term planation and erosion, which recorded uplift history of the Qinghai Xizang Plateau. Therefore, studies on their features, formation, distortion and ages are very important to reconstructing ages and amplitudes of uplifting of the Qinghai Xizang Plateau. Field investigations and mapping of step like landforms have shown that there are two extensive planation surfaces (the Summit Surface and the Main Surface), a erosion surface and many fluvial terraces. The Summit Surface with a height of more than 5 500m above sea level being located in the core of mountains in the Qinghai Xizang Plateau, was formed in Oligocene and Early Miocene. The Main Surface is widespread and occupies the most part of the Qinghai Xizang Plateau, whose altitude decreases from 5 000m in the northwestern part of the Plateau to 3 500m in the eastern part. The Main Surface was formed during 7.0～3.6MaB.P. when its height was less than 1 000m a.s.l. The erosion surface, being distributed in the marginal mountains of the Qinghai Xizang Plateau, was formed in 1.8～1.4MaB.P. Under the erosion surface, Jintahe River in the eastern Qilianshan developed five terraces whose ages downwards are 1 24MaB.P., 0.78MaB.P., 0.14MaB.P., 0.06MaB.P. and 0.01MaB.P. , respectively. The Summit Surface was uplifted and destroyed in 25～23MaB.P. because of tectonic movement, and then the Main Surface was developed. Breaking up of the Main Surface at 3.6MaB.P. indicates the beginning of intense rising of the Qinghai Xizang Plateau. The erosion surface and many fluvial terraces recorded uplift processes of the Qinghai Xizang Plateau in last 3Ma. These intense uplift events, which happened 1.8MaB.P., 1.2 MaB.P., 0.8MaB.P. and 0.15MaB.P. , respectively, were important to formation of the Qinghai Xizang Plateau.