Objectives: Tazhong No. 1 structural belt shows segmentation along strike which reflected directly by differentiation change in tectonic deformation patterns and activity intensity of it, but the kinematic characteristics and genesis of segmental deformation are still not clear, which need to be studied deeply. Methods:In this paper, based on the two- dimensional and three- dimensional seismic data, the geometric and kinematic characteristics of the Tazhong No. 1 structural belt are studied through fine structural analysis, statistics of kinematic parameters and determination of active stages. Besides that, the segmental deformation mechanism is analyzed and segmental controlling factors are also discussed. Results: Through fine structural analysis of 91 seismic profile, it shows that there are 7 kinds of deformation patterns of hanging- wall along Tazhong No. 1 structural belt striking. The width, vertical displacement and throw show 3- segment character along striking of Tazhong No. 1 structural belt with being largest in the east, followed by the west and the smallest in the middle, all the same. Conclusions: The tectonic deformation patterns and kinematic characteristics of Tazhong No. 1 structural belt can be divided into three segments with Well Zhonggu 15 and Well Zhonggu 21 being the boundary. The main active mechanism of the western section is the short- distance slipping thrust and the rotational deformation of the stratum. The ratio of throw and vertical displacement of the same horizon (H/h) is the largest; the main active mechanism of the middle section is the strike slipping, and the H/h ratio is about 1; the main active mechanism of the east section is the long- distance slipping thrust and intense fold, with the H/h ratio between the two. The difference of the activity mechanism leads to different structural styles of each section, which are fault- related fold controlled by the basement- involved thrust fault, the fault- controlled slope break whit the strike- slip fault developing, and the block fold controlled by the intense activity of the thrust fault. The activity intensity of three segments is the largest in the east, followed by the west and the smallest in the middle. The multistage activities of the west Kunlun orogenic belt and the Altyn orogenic belt provided the development background for the segmental deformation of the Tazhong No. 1 structural belt. The basement structure and pre- existing faults play as the main controlling factors for the segmentation. The NE- trending strike- slip faults adjust thrust activity of the structural belt, and play as associated faults.