Based on the development models of growth strata, in combination with the type of unconformity and variational rules of the Maigaiti slope, finely research tectonic evolution of the Maigaiti slope. In the Early Cambrian, the Maigaiti slope presents the characteristic of the north dip slope and structural heighs lies in the north of the slope. In the Mesozoic, tectonic evolution of the Maigaiti slope is characterized by segmentation. In the western slope, Late Carboniferous—Early Permain is the main period of tectonic evolution, whereas, the main tectonic movement stage of eastern slope is postponed to Late Permain. The Maigaiti slope had reversed to south dip slope in the Cenozoic and structural heighs migrated to northern slope.Eastern slope started its activities since Miocene, whereas western slope was delay until Pliocene and intensity of tectonic activity in eastern slope is stronger than western.