Abstract:The intersection area of eastern Sichuan and Dabashan fold-thrust belt is located in the northeastern Sichuan Basin and is composed by Wenquanjing-Macaoba anticline belt, Yunanchang anticline belt and Fangdoushan anticline belt. The formation and evolution of the intersection area is controlled by eastern Sichuan structural belt and Dabashan structural belt. Therefore, this study is very meaningful to understand the collision relationship between the South China plate and the North China plate and its evolution process. Based on field investigation, drilling data, logging curves and 2D seismic data, guided by fault related folding theory, this paper revealed the geometric features of the intersection area with four seismic profiles which are interpreted precisely and restored the tectonic kinematics process of the study area by using 2Dmove software. This paper draws the following conclusions: (1) the intersection area shows a giant synclinorium structure in the south-north directions and be divided into three structural layers in vertical direction by three detachment layers which are the gypsum-salt bed of Lower Triassic Jialingjiang formation, the mudstone and shale of Silurian and the mudstone and shale of Lower Cambrian. The upper structural layer mainly occurs decollement deformation, whereas there are many faults in the middle and lower structural layers where developed duplex structures, pop up structures and fault-bend folds. (2) In the study area, the deformation of the middle structural layer is the strongest, with a structural shortening rate of 10%, and the shortening rates of upper and lower structural layers are relatively small, both of which are about 6%. Meanwhile, the shortening rate of each structural layer increases gradually from west to east. (3) Since the Mesozoic, the evolution of the study area has been divided into three stages: stable sedimentary stage from late Triassic to late Jurassic, opposite thrusting stage from early Cretaceous to early Paleogene and the shaping stage from late Paleogene to present.