Abstract: Taking the Tangjiaping large-scale porphyry molybdenum multi-metal deposit in northern piedmont of Dabieshan in south of Henan province as an example，the cause of porphyry molybdenum polymetallic deposit in the northern piedmont of Dabieshan in south of Henan province and its geological and geophysical characteristics are elaborated.The comprehensive geophysical prospecting method is carried out in the typical mining area（controlled source audio frequency magnetotelluric sounding method and induced polarization method)，profile test and the test of the physical property of the exposed rocks in the mining area are made.The experimental results show that the porphyry molybdenum deposit in the area has the features of high resistivity and high polarization，and the displays of metallogenic geological body and porphyry body are obtained by adopting the controlled source audio frequency magnetotelluric sounding method and the induced polarization method.The drilling results show that，the controlled source audio frequency magnetotelluric sounding method and induced polarization method are competent to search for porphyry type molybdenum deposit in the area.Therefore，the research provides technical reference for further exploration of porphyry deposit in the area and also provides technical support for deployment and rapid breakthrough in further geological prospecting work.

Key words: Controlled source audio frequency magnetotelluric sounding method, Induced polarization method, Porphyry molybdenum polymetallic deposit, Northern piedmont of Dabieshan