Abstract: The Three Gorges Reservoir Area is a region with sensitive, fragile and complicated ecological environment in the upper reaches of the Yangtze River. The construction of its ecological security pattern plays an important role in maintaining regional ecological security and achieving regional sustainable development. In this study, the Chongqing section of the Three Gorges Reservoir area was used as the research area, using 2018 land use status data and remote sensing data to build an evaluation system of the importance of ecological services and ecological sensitivity to comprehensively determine ecological source areas; Determine the resistance value and use the minimum cumulative resistance model to build an ecological corridor to form an ecological security pattern in the Chongqing section of the Three Gorges reservoir area. The research results show that the ecological source area of the Chongqing section of the Three Gorges Reservoir area is 13 660.80 km ², accounting for 29.61% of the total area of the study area, which is mainly distributed in Wuxi, Fengjie, Shizhu, Kaizhou and other counties; 81, with a total length of 3 069.29 km, the corridors are distributed in a tree-like radiation, showing the spatial pattern of "Northeast-Southwest" tree-like distribution; The ecological security pattern of "one corridor and two circles" in the northeast of the Three Gorges Reservoir, the southwestern urban ecosphere of the Three Gorges Reservoir, and the central corridor connecting the two gorges is formed by the ecological source and the corridor. The results of the study are of great significance to the protection of the ecological safety of the Three Gorges Reservoir area and can provide a scientific basis for the environmental protection of the Three Gorges Reservoir area.