Abstract: Scientific identification of key areas for ecological restoration of territorial space and systematic promotion of ecological governance of "mountains, water, forests, fields, lakes and grasses" is of great significance for building a strong ecological security barrier in China. Taking Xi'an City, which is located in the northern foothills of Qinling Mountains, as the study area, based on multi-source data such as remote sensing, meteorology, topography and geomorphology, the InVEST model, water balance model, RUSLE model, MSPA model, the hierarchical analysis method, and the circuit theory were used to construct the ecological security pattern and identify the key areas of ecological restoration in Xi'an City. The results show that Xi'an City contains 36 ecological source areas with a total area of 2 591.96 km², mainly distributed in the Qinling Mountain Range, the northern part of Mountain Li, and around important reservoirs such as Wei River system. It has 70 ecological corridors, with a total length of 686.23 km and, in combination with the characteristics of ecological elements such as mountains, water, forests, fields, lakes, grasses, wetlands and valleys, the overall ecological security pattern of "one screen, one belt, one ring, multiple corridors, and multiple slices" was constructed. There were 45 ecological pinch points identified in Xi'an, with a total area of 33.56 km², most of which were located in low-resistance areas and corridors with higher ecological levels. There were 25 ecological obstacles, with a total area of 39.32 km², and most of the ecological obstacles were concentrated in the high-traffic urban areas in the northeastern part of the study area, where human interference was strong. Considering the characteristics of the natural background and ecological problems in Xi'an, ecological restoration proposals were put forward to strengthen the protection of the source areas, enhance the scale of the source areas, emphasize the protection of the corridors, optimize the corridor systems, repair and optimize the pinch points, remove or improve the obstacle points, so as to help the construction of the ecological civilization and high-quality development of Xi'an.