Abstract: To analyze the tectonic evolution characteristics of the western Qiulitage tectonic belt in Mesozoic-Cenozoic, two profiles across the western Qiulitage tectonic belt are restored according to balanced section theory, and BasinMod-1D software of PRA company is used to analyze subsidence history of two wells which are in the western Qiulitage tectonic belt. And then, it is concluded that this belt was uplifted at the end of Triassic, and then was in the situation of interruption in deposition due to no structural subsidence. It subsided duo to structural movement during Early Cretaceous to Middle Cretaceous, and was uplifted and eroded during Late Cretaceous. The Early Himalayan tectonic movement was weak during the deposition stage of Kumugeliemu Formation, Middle Himalayan tectonic movement was intenser during the deposition stage of Suweiyi Formation and Kangcun Formation, and Late Himalayan tectonic movement was the intensest from the deposition stage of Kuche Formation to Quaternary. The deformation of strata above and below salt layer was very incoordinate. Shortening amount of strata above salt layer was more than that of strata below salt layer as a result of decollement function of salt layer.

Key words: tectonic evolution, balanced section, subsidence history, the western Qiulitage tectonic belt, Kuqa Depression