Objectives: This work shows the results of computing the 3D density disturbance images in Yangtze Craton and interpretation of the these results based on geodynamics and petrophysics, especially for crust beneath craton terrains. Methods:We apply the scale—depth relationship of gravity anomalies and the multiscale wavelet analysis for extracting crustal density information from surface Bouguer gravity data, and presents density disturbance images of the upper, middle and lower crust, which represent the three dimensional density structures in the studied area.Results:The tectonic boundary of the Yangtze craton are coincided with the uppercrust density perturbation gradient zones. But inside the craton, there is no obvious correspondence between the density perturbation of the upper crust and the tectonic zoning. However, it has a certain correspondence with the geological map. According to the principle of uniforming structure boundaries and shallow density perturbation gradient bands in the crust, the structure map of the deep crystal basement is drawn by using the detail of gravity wavelet in the study area, which provides a reference for accurate location of basement structure. Because the continental crust often occurs near horizontal detachment of strata, the ground geological structure and underground structure may change obviously. The study of crustal tectonics based on density imaging shows that the ancient collision processes caused cracks and faults in the continental crust, which were resurrected during the Triassic collision between the North China and Yangtze Craton, gradually reducing the hotfluid activity, rock anatexis and melting in the middle crust. The Xuefeng —Mufu —South Anhui Huangshan Mountain Yanshanian Granite Belt was formed by this way.Conclusions: The granite anatexis is a process of Lithospheric cratonization. Nowadays of Lithospheric craton. Nowadays the Xuefeng—Mufu—Huangshan mountains still belong to weak earthquake regions, which indicates that the Yanshanian Granite Belt has become the Huanan craton, but the degree of its cratonization is slightly less than that of Yangtze massif.