On the basis of the seismic data and geological information,we analyzed the tectonic characteristics, evolution and formation mechanism of high and steep structures in eastern Sichuan.The high and steep fault folding belt experienced the dynamic environment change from extension to compression,and is divided into four tectonic evolution stages: the formation of incompetent folding (The Indosinian before), the formation of embryonic folding(The Indosinian period), the formation of active folding (The Yanshanian period), the formation of fold forming (The Himalayan period).The present tectonic framework of high and steep fault folding belt in eastern Sichuan is controlled by pre existing structures,and multiple stages of compression tectonic superimposition, finally resulted in the formation of high and steep fault folding belt with is ejective structure.Influenced by two sets of gypsum salt detachment layer and one set of shale detachment layer, the high and steep fault folding belt in eastern Sichuan can be divided into three tectonic deformation layers. During the multiple stages of extrusion stress, each structural layer shows various structures evolution due to the differences in the longitudinal formation and evoluation.There is some guiding significance to the further study on the control of the multi phase tectonic superimposition on the salt deposits and the oil and gas preservation.