By using the drilling characteristics of continuous coring, the Quaternary stratigraphic sequence can be found out, and then top surface depth and fluctuation of bedrock determination, estimation models verification, geological structures research, delineating important contact relation between geological bodies can be realized and can be used for geological mapping. Based on the application of shallow drilling technology for geological mapping in Aohan County, a set of drilling technical methods combination is summed up, which is suitable to the geological mapping in shallow overburden area of desert steppe, the key points of technical operation for overburden area mapping by shallow drilling are presented, which provides technical support for geological survey and mineral resources exploration in similar landscape area.