Abstract: Through abundant field surveys, the structural elements which can reflect the deformation trace of paleostructural stress field such as Beichuan-yingxiu fault, foreland fault, are summarized and analyzed. Then, the structural stages and mechanical properties of structural trace are analyzed. Thus, the structural deformation history and stress history are recovered. The result shows that the Longmen Mountain has witnessed more than ten times of structural deformations with different directions and different stress properties. Combined with the theory of regional tectonics, dynamic interpretation is performed in this article.

Key words: trust belt of Longmen Mountain, deformation stage, dynamics, tectonic evolution