In this paper the marks for distinguishing the active fault relating to earthquakes in geophysical data, such as gravity and geomagnetic fields, magnetotelluric exploration and seismic prospecting, are introduced. Taking the Wushi seismic belt as the example, the method of synthesizing those geophysical exploration data for active fault research is analyzed. The result shows that choosing different data group according to different research purpose could get information of the seismic belt such as fault distribution, deep structure and active features.