Guozigou in Yili of Xinjiang is located at the west margin of north Tianshan. The Precambrian strata in Guozigou are exposed relatively completely, which can be subdivided into Kayingdi Formation, Tarqiate Formation and Talisayi Formation from bottom to top. According to sedimentation type, depositional combination, sedimentary facies and stratigraphic correlation with Quruqtagh area in Xinjiang, and combined with previous research results, it is inferred that these strata belong to Nanhua System. Meanwhile, Kayingdi Formation and Tarqiate Formation can be correlated with Huangyanggou Formation in Quruqtagh area, and Talisayi Formation can be correlated with Teruiaiken Formation.