The western Sichuan agriculture-pastoral ecotone is located in the alternate zone of the first and second tiers in China. It is a typically ecologically fragile area in the west, with significant undulations, complex topography and ecological environment. The study of spatial conflict (living-production-ecological) in the agriculture-pastoral ecotone of western Sichuan will contribute to the ecological security and social and economic coordinated and benign development in the ecotone. This paper takes four counties of Aba Tibetan and Qiang Autonomous Prefecture (Malkang, Li County, Heishui, and Songpan) as examples. The living-production-ecological space in the study area is divided into four types:living-production space, ecological-production space, production-ecological space, and ecological space. A spatial conflict measurement model is built to calculate the living-production-ecological spaces conflict index in the study area from 2005 to 2025. The results show that ecological production space accounts for the largest proportion of the four counties area from 2005 to 2025, followed by ecological space, production-ecological space, and living-production space. The area of living-production space and production-ecological space continues to rise, only the area of ecological-production space is reduced, and the area of ecological space is dominated by fluctuations. From 2005 to 2025, the region is dominated by medium-sized spatial conflicts. From 2005 to 2025, in general, the high-high agglomeration areas of spatial conflict values are mainly located in the four-county agriculture-pastoral ecotone and the intersection of living and production spaces, and their performance is obvious. The high-high agglomeration areas are gradually expanding in the agriculture-pastoral ecotone of Songpan County and Malkang County, and the high-high agglomeration areas of Heishui County and Li County first decrease and then slightly expand. The low-low agglomeration areas of spatial conflict value are mainly located at the intersection of ecological-production space and ecological space. Areas with inconspicuous agglomeration are dominated by ecological space. On the whole, the ecological-production space conflict intensity is the highest in the living-production-ecological spaces in the agriculture-pastoral ecotone of western Sichuan.