The gravity field contains the superimposition effect of heterogeneous bodies with different densities. In order to divide the gravity anomaly more effectively, the authors tentatively used the wavelet analysis with the function of multi-scale analysis to separate the gravity fields. Through the wavelet multiple decomposition of the gravity fields in Guixi area, the authors distinguished the sources which had relatively shallower burial depth and smaller scale from those which had comparatively greater burial depth and larger scale. Such a result reflects the heterogeneity of the densities of geological bodies with different burial depths and different scales, and hence can quite effectively delineate tectonic basins and deep concealed rock bodies, with an audiovisual demonstration of their attitude variations. It is therefore concluded that the application of wavelet analysis to decomposing the gravity fields can yield fairly satisfactory result, and thus deserves further popularization.