Based on an integrated analysis of large quantities of outcomes obtainedin such fields as geology, aeromagnetic survey, gratity, telluric electromagneticsounding, seismic exploration and density determination, we have established a geological-geophysical model for Central Sichuan area. With the direct calculation method, we have analysed the Central Sichuan gravity anomaly centering on Dazu. Finally, a new viewpoint is put forward concerning the composite origin of the Dazu gravity high.