Abstract: The sedimentary environment is subject to the method and scale of tectonic movement in different tectonic seg- ments,which results in obvious segmentation of the thick- ness of strata of different geologic epochs in the sedimentary cover of the northwest edge.Due to different tectonic posi- tions of three fracture zones,the attitude of fractured sur- face,the deformation style and degree are varied.A joint- like structural deformation,namely the two ends is wide,the middle is thin,was generated at the transition position,be- cause of the trends change of the three fracture zones.The segmentation of tectonic movement is double meaning. namely spatial segmentation and temporal segmentation.The spatial segmentation is manifested by the apparent difference in the structural intensity,tectonic style,and the formation mechanism of different structural section and subsection at the same epoch,while the temporal segmentation is manifes- ted by the apparent disparity in the movement intensity and the movement way of the same structural section in different movement period.