The pulse uplift of Tibetan Plateau is a compressing uplift event resulted from the inner continent subduction of Indian Plate since ca.55 Ma. The uplift of northern Tibetan Plateau occurred in the Late Cenozoic definitively influenced the tectonic formation and the large scale aridity. This study extends this section, and 9 sites 90 samples were collected from grey yellow mudstones and siltstone. The high resolution magnetostratigraphic results and magnetic susceptibility suggest the age of these strata is from 2.2~0.1 Ma.