The invention relates to a technological method for emergency fast treatment and reuse of oil tank farm fire-fighting sewage. The method includes the steps of: (1) using an explosion-proof submersiblepump to send fire-fighting sewage into a self-cleaning filter to remove solid impurities; (2) pressurizing the filtered sewage by a booster pump, then sending the sewage into a walnut shell filter tank to remove suspended matters and oil from the sewage; (3) letting the effluent water of the walnut shell filter tank enter a ceramic membrane filter tank for further filtration of impurities and oilin the sewage; and (4) pumping the effluent water of the ceramic membrane filter tank into a water storage tank on a fire-fighting truck by a pump, and reusing the treated water in fire extinguishment. The method provided by the invention uses the walnut shell filter tank and the ceramic membrane filter tank for filtration and oil removal of fire-fighting sewage, and has the advantages of fast treatment speed, high treatment efficiency, on-site reusability of fire-fighting sewage, energy saving and environmental protection.