The combinational test of geophysical prospecting methods in the Wanglou ore district of Wugang City shows that the high precision magnetic method and the controlled source audio-magneto-telluric method seem to be the best combination in search for metamorphic iron deposits, that high precision magnetic method can be used to determine the existence or nonexistence of a deep underground magnetic geological body, and that the controlled source audio-magneto-telluric (CSAMT) can be utilized to determine the existence or nonexistence of a low resistance body. In combination with geological metallogenic regularity, we can judge whether the magnetic anomaly is caused by an iron ore body or not. According to the combined geophysical field characteristics, we can determine the spatial mode of occurrence of the iron ore body.