：The Qiagong iron deposit is a newly discovered deposit, but geometric characteristics of its ore body such as the shape, size, strike, position, attitude and boundary have not been systematically studied. Based on a wavelet and multiscale analysis of theoretical model data and measured data and a comparison of the application results between the upward continuation and the wavelet and multiscale analysis, the authors hold that the wavelet multiscale decomposition of magnetic anomaly can play an important role in search for deepburied mineral deposits.