The Sugaite structural belt in west Xinjiang was located at the front of arcuate nappe outliers of the Kunlun Mountains. East of it was the Qimugen Salient of the Southwest Depression, Tarim Basin. Based on determinations of the geological attribute of seismic reflectors, the paper studied structure features of the Sugaite structural belt, and thought that the belt was composed of nappe outliers in the surface and three imbricated thrust sheets consiting of the Permian to Paleogene strata in the deeper. The structure deformation started in Teriary (Pliocene when the Artushi Formation deposited), and the structural belt created in Pleistocene of Quaternary. To synthesize the thrust-nappe outlier structures in West Kunlun Mountains and the data of sources rocks and reservoirs from the drilling wells, it was represented that the Sugaite structural belt had two good beds of source rocks: the Carbono-Permian and Jurassic, two good layers of reservoir: the Cretaceous and Paleogene, and correspondingly, two reservoir-cap rock associations. Furthermore, the trap and migration conditions there were relatively good, so the Sugaite structural belt might be a prospective area for oil-gas exploration.