In order to realize the boundary delineation of small coal mines in Jingu Coal Mine, the ground airborne frequency domain electromagnetic system is used to carry out for the survey and test work of the small coal mine goafs. In the actual exploration, 124 survey lines in the north-south direction were designed, and the UAV equipped with the detection antenna was used to continuously collect the electromagnetic data. Through data processing and interpretation, the apparent resistivity structure drawing within the range of -50~-300 m underground in the survey area is obtained. According to the relatively low-resistance anomaly distribution, the suspected locations of the two coal mine goaf areas are demarcated. After comparing with the actual coal mining data, there is a goaf with high water filling under the two defined low resistance abnormal areas. The research results prove the feasibility and effectiveness of the ground airborne frequency domain electromagnetic system in the investigation of small coal mines.