The invention relates to a method for dewaxing and deoiling MTO/MTP oxygen-containing compound stripping tower kettle liquid. The device comprises ultrafiltration membrane equipment, a two-phase cyclone separator, an oil groove and an oil skimmer. The MTO/MTP oxygen-containing compound stripping tower kettle liquid is firstly subjected to ultrafiltration membrane separation; ultrafiltration membrane permeate is returned to an oxygen-containing compound absorption tower to be recycled; ultrafiltration membrane concentrated liquid enters the two-phase cyclone separator; an oil and emulsified wax mixture separated out from the top of the two-phase cyclone separator enters the oil groove; the oil skimmer in the oil groove skims and recovers the oil at the upper layer of the mixture, so as to achieve separation and recovery of oil and wax; the concentrated liquid from which the oil and emulsified wax are removed is returned to the ultrafiltration membrane system to be recycled from the bottom of the cyclone separator. By adopting the method, the oil and emulsified wax in the oxygen-containing compound stripping tower kettle liquid can be effectively removed, and continuous and stable operation of the device is achieved; meanwhile, oil and wax in the kettle liquid are recovered, waste of resources is avoided, and pollution to the environment is also reduced.