Using 1∶50 000 high precision aeromagnetic data in combination with the regional geological background, the authors analyzed aeromagnetic anomaly features in Da Hinggan Mountains. On the basis of geological, geophysical and geochemical data and the distribution of ore deposits (ore spots) as well as metallogenic regularity, quite a few aeromagnetic anomalies were delineated through sieving. According to the latest high precision aeromagnetic map and the anomaly characteristics of the known ore deposits in combination with comparative study and comprehensive verification, a magnetite deposit and lots of nonferrous metal deposits were discovered. verification was made on the basis of summarizing the experience, and the future prospecting targeting based on aeromagnetic data was pointed out.