Abstract: Based on the data of IHS2009, combining the results of previous studies, the stratigraphic features of Huqf Group from Precambrian to Early Cambrian in Oman Basin is analyzed in detail. The study shows that the strata of Huqf Group are the products of basin development from early rift to depression. Sedimentary environment which includes shallow sea, intermittent sea and intertidal-supralittoral zone is developed during this period. It is an important oil and gas stratum in this basin. The dolostone of Khufai member in Nafun Formation and evaporive of Ara Formation are important hydrocarbon source rocks. The dolostone of Buah member and biological rock of Ara Formations are the main reservoir. Obviously, oil and gas accumulation and distribution of Huqf Group in Oman Basin are controlled by structure evolution and sedimentary facies distribution. The main migration path of oil and gas is fracture and regional unconformity of the bottom of Ara Formation