Abstract: Abstract：Aiming at complex structure of Qigu fault-folded belts in Junggar Basin，structural evolution is studied in this paper.
ByinvestigatingmassifevolutionofMountTianshan，stratumdevelopmentofsurrounding，thechangeofsurfacewater，seismic
interpret profile，regarding theoretical geology as guidelines，combining standard stratigraphic section of between Triassic
and Neozoic，surface geology data，important interpretation profile of seismic exploration，integrated research report，plane
and profile structural characteristics of Qigu fault-folded belts in the period of Himalaya are researched in this paper. The
main structural characteristics of Qigu fault-folded belts is analysed and its structural model is divided. In this paper，it is
considered that the structural evolution of Qigu fault-folded belts is divided into four stages，including tilt stage，fault-folded
stage，detachment stage and wedging stage. It provides proof to exploration of Qigu fault-folded belts.

Key words: Key words： the southern margin of Junggar Basin, Qigu fault-folded belts, Mount Tianshan, structural evolution, extrusion uplift