Abstract: Traditional Qiang settlements embody the integration of regional culture, social structure, and natural environment, serving as central subjects in Qiang landscape studies. This research investigates 39 traditional Qiang settlements in the Zagunao River Basin, Aba Tibetan and Qiang Autonomous Prefecture, Sichuan Province, employing the landscape gene information chain theory to construct a four-dimensional analytical framework for systematically identifying and interpreting spatial forms and cultural genes. The findings reveal the following: 1) Traditional Qiang settlements demonstrate a distinctive morphology closely adapted to mountainous terrain, characterized by a spatial pattern of 'settlements following the terrain, surrounded by forests and fields'. 2) Religious beliefs, customary activities, and traditional crafts function as core landscape information elements, materialized through key nodes such as residential dwellings, watchtower, and Baishi tower, and connected via branching, zigzag, circular, and multi-level corridors, forming a resilient and culturally embedded landscape network. 3) The landscape gene information chain reveals the evolution from cultural imagery to spatial form, offering theoretical and practical guidance for the protection and renewal of ethnic settlements. In response to issues such as information chain fragmentation and cultural fading, this study proposes a strategy of authentic preservation, moderate restoration, and organic renewal. The research contributes to the theoretical development of landscape genes in ethnic settlements and provides a methodological reference for the identification, transmission, and planning of cultural landscapes in multi-ethnic regions.