Abstract: This paper discusses two Triassic transgression events,Triassic lithostratigraphy and Indosinian movement in the Qangbei Qamdo area,Tidet.Modern stratigraphic and sedimentologic studies suggest that during the Indosinian movement in the Qangtang Qamdo area was mainly controlled by three boundries of regional tectonic movements,forming two structural layers.Only two stages belonged to the main phase of the Indosinian movement.All the Indosinian sea transgressions and regressions,sedimentation,magmatism and volcanism,deformation metamorphism and mineralization are products of the two stages of tectonic movements.