Abstract: Physical property test of the rocks and ores in the field shows that the iron ore has a high-strong magnetic properties,while the normal rock are micro or weak magnetic compare with the iron ores,which provides a reliable basis of geophysicist to carry out ground high-precision magnetic survey in the mining area.The research work in the area is to detect the measurement,and to conduct magnetic anomaly inversion for under ground ore body.Compared with geological and drilling data,the obtained results are good.