Abstract: Volcanic rock reservoirs of hydrocarbon are very important types of reservoirs in Junggar Basin. In recent years, the exploration of this type of reservoir has shown a multi-blooming scene in the eastern Junggar Basin. In order to accelerate the exploration of Carboniferous volcanic reservoirs in the eastern Junggar Basin, the fault system in the eastern Junggar Basin is inferred and interpreted by high-precision aeromagnetic, regional gravity, seismic and drilling data, and the buried depth of magnetic bodies in the area is analyzed. The magnetic depth based on aeromagnetic calculation shows that the minimum buried depth of the magnetic body in the eastern uplift area of Junggar Basin is between 0.5-2.2 km, which clearly presents a tectonic pattern of north-south zoning and east-west zoning. Bounded by a nearly north-south deep fault in the middle of the uplift region, there are obvious differences in depth, scale and morphology between the eastern and western magnetic bodies. Under the influence of the secondary fracture, the eastern magnetic body is distributed in a northeasterly direction, while the western magnetic body is distributed in a northeasterly and near east-west directions. According to the control of fault system and magnetic buried depth to the hydrocarbon accumulation in volcanic rock mass, combined with the distribution of hydrocarbon generation intensity of Carboniferous source rocks, three favorable exploration zones of volcanic reservoirs are predicted in the eastern Junggar Basin.