Abstract: In terms of gravitational and magnetic anomaly data, various information after the processing （ upward continuation and horizontal direction derivative, etc. ）, the features of gravitational and magnetic field in the Tarim Basin are analyzed. The basement depth and the Moho depth are also computed. The gravitational and magnetic anomalies vary changefully on the basin edge and gently inside the basin. The Moho upheaves at the basin center and dips toward the basin edge. The basement depressions appear at the foreland basin. The faults of edge are parallel to basin boundary and extend to large scale. It may be explained that the rigid lithosphere is flexed and the large faults are developed at the basin edge due to the remote effects from the India and Qinghai-Tibet collision. The energy is mainly released during the activity of faults, and the activity on basin edge is stronger than in the basin interior.