Based on the Triassic stratigraphic data in eastern Sichuan and Chongqing, this paper carried out the correlation analysis of the distribution pattern and sedimentary characteristics of the Triassic marine Red Beds in the study area. 12 members of five groups of marine Red Beds have been preliminarily identified in the Triassic marine Red Beds in eastern Sichuan and Chongqing, namely: Feixianguan Formation (Daye Fm.) Red Beds (Induan), Jialingjiang Formation marine Red Beds (Olenekian), Leikoupo Formation (Badong Fm.) marine Red Beds (Anisian), Tianjingshan Formation marine Red Beds (Ladinian) and Ma’antang Formation marine Red Beds (Carnian). And the Triassic Marine Red Beds in eastern SichuanChongqing area are compared with the Triassic Marine Red Beds in adjacent areas (west- central Hubei and Guizhou). The study reveals that all the marine Red Beds in eastern Sichuan and Chongqing should be the coastalshallow water Shelf Red Beds (SRB), and the debris materials and Fe2O3 of the Triassic marine Red Beds in eastern Sichuan and Chongqing are mainly from KhamDian old land and other highlands such as Longmenshan. In addition, this paper also discusses the relationship between the vertical distribution of the Triassic marine Red Beds and the paleoclimate, paleolatitude, water depth, vegetation, minerals, rock color, and tectonic movement in the eastern Sichuan and Chongqing regions during the Triassic period. In a word, this study provides the basic data for further research on the distribution pattern and stratigraphic correlation of the Triassic marine Red Beds in China and the world.