The dumping of organic waste liquid in the shaft of an abandoned coal mine results in environmental pollution and groundwater pollution in the roadway and goaf. In this paper, based on the actual situation of the site, the dumping shaft and its surrounding areas were selected as pilot areas, and the pilotscale study of the polluted site was carried out by using a twostage combined remediation technology, “groundwater extraction treatment+insitu oxidation and recycle”. This paper introduces the general situation of site pollution, the design and implementation of pilot scheme for groundwater remediation, and the evaluation of remediation effectiveness. The results show that the highest removal rates of COD and dichloromethane in groundwater after pilot treatment were 97. 88% and 99. 74%, respectively. The pilot test suggests that the twostage remediation technology of “groundwater extraction treatment+in- situ oxidation and recycle” achieved good removal efficiencies for organic pollutants in deep groundwater in complex stratum structures such as roadway and goaf in mining area, and can be applied in a full scale field remediation.