Abstract: As an important component of the oil and gas transporting system, skeletal sand body controls the lateral migration and distribution of oil and gas in space. The effective connection is usually affected by the development of faults in the sand bodies as well as the microscopic heterogeneity of the sand bodies. By single well analysis for the main wells in the western area of the Chepaizi uplift in Junggar Basin, on the basis of regional stratigraphic framework and sedimentary facies, the Jurassic skeletal sand bodies are identified. With drawing of connection-well sections and planar distribution contour maps of skeletal sand bodies, the macro connectivity of the skeletal sand bodies is analyzing. Based on the connectivity research of porosity and permeability, with systematic sampling from sand bodies of each layer, the microscopic connectivity is qualitatively described. With geological statistics, the microscopic connectivity is quantitatively evaluated. Therefore, the skeletal sand bodies of Jurassic Toutunhe Formation and Badaowan Formation are comprehensively evaluated from three aspects, i.e. profile, plane and microcosmic view. The results indicate that the connectivity of skeletal sand bodies in the strata of J₂t₃ and J₁b₃ is relatively well.