In order to make use of high precision aeromagnetic data for metallogenic prognosis, it is necessary to extract the weak aeromagnetic anomaly information. Using aeromagnetic enhancement methods (automatic gain control referred to as "AGC") to process high precision aeromagnetic data in and around the Lamasucopper deposit, the authors highlighted the aeromagnetic information caused by weak copper polymetallic anomalies.It is shown that there are many weak anomalies on both sides of the SayramLake, similar to things of the Lamasucopper deposit. It is considered that aeromagnetic augmented processing can extract information of favorable aeromagnetic anomalies, such as copper and gold metallogenic deposits, and can also classify the favorable buried fault structures, so as to provide scientific basis for metallogenic prognosis.