With the increase of exploration drilling works， the conflict between exploration drilling and conservancy deepens， such as pollution of topsoil and vegetation due to long drilling periods of deep holes， improper disposal of drilling mud and cuttings， etc. On the deep drilling project of Guma Iron Mine in Luanzhou city， Hebei province， a series of green exploration technical measures， such as iron circulating tank， iron water tank， impervious cloth， bread brick hardened ground， were taken before and during drilling operations， so as to ensure that the drilling site is not polluted and the original appearance is reinstated after drilling. The experience can be used for reference for green drilling of deep core holes in the future.