In order to analyze characteristics of underground sources of the high accuracy magnetic data in an effective way, the

authors employed wavelet transform to make a multiscale analysis of the magnetic data. Based on the inversion and

interpretation of the plane and profile data, this paper built a geophysical model for the working area by using the 2.5D

inversion method. Tests show that the wavelet method can separate the information of different underground sources effectively

and has reliable calculation accuracy and higher resolution than traditional extension and filtering methods.