As a national energy base， the Ningdong area of Ningxia has deployed and implemented a large number of core drilling projects in recent years， resulting in a large amount of waste drilling fluid. Because the disposal method of waste drlling fluid was relatively simple， it has brought some damage and impact on the surrounding environment. Through investigation and research on the treatment methods of waste drilling fluid in the Ningdong area， the solidification method was finally selected to treat waste drilling fluid. The produced waste water and solidified substance meet the relevant national discharge standards. A set of disposal methods suitable for waste drilling fluid in similar areas has been developed， which is helpful to protect the fragile ecological environment in the Ningdong area．