Abstract: This study systematically analyzes the control of detachment layer distribution on structural style differences and trap-hydrocarbon generation coupling relationships in the frontal tectonic triangle zone of the Kunlun Mountains, based on seismic and drilling data. The research indicates that the evolution of the piggyback basin in the Upal section of the western Kunlun Mountains began with fault-bend folding controlled by Carboniferous-Permian and Paleogene detachment layers. Subsequently, the thrust in the fold core experienced intense uplift, ultimately leading to flexural subsidence due to rock gravity loading, completing a three-stage evolution process. The Sugait-Qimeigen-Kedong section of the western Kunlun Mountains, influenced by multiple detachment layers in the middle crust, Cambrian, and Carboniferous- Permian systems, developed imbricate thrust belts and detachment thrust belts. The former is dominated by Neogene-formed unsaturated hydrocarbon reservoirs, while the latter inherited Triassic structures with well-preserved traps, making it a favorable area for Cretaceous hydrocarbon accumulation. At the endpoints of the tectonic wedge, intense erosion of source rocks generally results in a lack of effective hydrocarbon charging. The Duwa-Wujiate section of the central Kunlun Mountains only developed a Cambrian detachment surface, exhibiting large-scale fault-bend folding and lacking Carboniferous-Permian source rocks. This study clarifies the critical role of detachment layers in controlling structural evolution and hydrocarbon distribution.