Based on the new-round high-precision airborne geophysical at the middle of Xilamulun river, the regional tec- tonics, deep faults and tectonic magmatic rocks were systematic studied. In this paper,the authors analyzed deeply regional magnetic characteristics, in the Xilamulun river fault zone, Daxinanling main ridge fracture and the low-invased tectonic-mag- matic belt structural feature at the north side of north china platforrrL The deep geological information has been revealed. Furthermore,in this paper,the authors generalized geological-geophysical characteristics of known pool of multi-metal mine (points) in this area. All of those could be offer some reference for further deep space prospecting.