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塔西南坳陷北缘的新生代构造形变受控于近南北向的挤压。由于所处构造位置不同，西段和东段变形样式有很大差别。据此，可划分成东西两个变形区：西部称南天山前缘构造变形区；东部称麦盖提斜坡北缘构造变形区。前者构造形变与南天山冲断一褶皱带向南的推挤密切相关，并受西昆仑冲断－褶皱带向北推挤的叠加改造。总体呈自南而北的前展式，变形样式主要有：叠瓦状断裂组合、断弯背斜、构造三角带、隔挡式褶皱等。后者的西段受色力布亚断裂控制，以边冲与走滑复合为主要变形机制，形成沿断裂走向分布的断裂背斜带；东段受玛扎塔格断裂控制，以左旋压担为主要变形机制，形成复杂的扭动断裂带。
The Cenozoic tectonic deformation in the northern margin of the southwestern Tarim Basin is controlled by the nearly north-south compression. Due to the construction of different locations, the western section and the eastern section of the deformation styles are very different. According to this, it can be divided into two deformation zones: the western zone of the southern Tianshan Mountains tectonic deformation zone; the eastern zone of the northern margin of the Maigaiti slope tectonic deformation zone. The former tectonic deformation is closely related to the southward thrust of the South Tianshan thrust-fold belt, and is superposed by the thrust thrust of the West Kunlun-Northward thrust fold belt. In general, the former foreshortening forms from south to north. The main deformation modes are: imbricate fault assemblage, broken anticline, structural triangular belt and gable folds. The western segment of the latter is dominated by the Belipulian fault and the strike-slip and strike-slip assemblage are the main deformation mechanisms to form the fault anticline along the strike of the fault. The eastern segment is controlled by the Mazhatage fault, As the main deformation mechanism, the formation of complex twist fracture zone.