The Longmen Shan foreland basin is one of typical foreland basins along the eastern margin of the Tibetan Plateau. The Late Triassic-Quaternary strata there, more than 10000 m thick, are divided into six megasequences by unconformities or erosion surfaces. Two deposional patterns of megasequences are distinguished: one is wedge-shaped; the other is tabular-shaped. The Late Triassic to Quaternary tectonic activity along the Longmen Shan thrust belt are divided into three thrust stages and three strike slip stages according to deposional patterns of megasequences. The three thrust stages include Late Triassic, Late Jurassic to Early Cretaceous and Late Cretaceous to early Tertiary; the three strike slip stages include Early-Middle Jurassic, Middle Cretaceous and Late Tertiary to Quaternary. During active thrusting stages, the thrusting and loading along the Longmen Shan thrust belt resulted in asymmetric subsidence of the foreland basin and tilting of the forebulge to deposit wedge-shaped megasequences. During strike slip stages, erosion led to an increasing flux of sediments so as to deposit a tabular-shaped megasequences. Therefore these megasequences are not only a sedimentary response for thrusting and strike-slipping along the Longmen Shan Mountains on the Eastern Tibetan Plateau,but also a sedimentary response to accretion of the Cimmerian continents and the India/Eurasia collision. The Longmen Shan foreland basin is one of typical foreland basins along the eastern margin of the Tibetan Plateau. The Late Triassic-Quaternary strata there, more than 10000 m thick, are divided into six megasequences by unconformities or erosion surfaces. Two deposional patterns of megasequences The Late Triassic to Quaternary tectonic activity along the Longmen Shan thrust belt are divided into three thrust stages and three strike slip stages according to deposional patterns of megasequences. The three thrust stages include Late Triassic, Late Jurassic to Early Cretaceous and Late Cretaceous to early Tertiary; the three strike slip stages include Early-Middle Jurassic, Middle Cretaceous and Late Tertiary to Quaternary. During active thrusting stages, the thrusting and loading along the Longmen Shan thrust belt resulted in asymmetric subsidence of the foreland basin and tilting of the forebulge to deposit wedge-shape During strike slip stages, erosion led to an increasing flux of sediments so as not to a sedimentary response for thrusting and strike-slipping along the Longmen Shan Mountains on the Eastern Tibetan. Plateau, but also a sedimentary response to accretion of the Cimmerian continents and the India / Eurasia collision.