Abstract: Technology extinguishing method is an effective method for the fire fighting of oil tank. Working principle and application scope of 7technology extinguishing methods such as valve closing for feeding break, valve opening for diversion, stirring for extinguishing, materialfilling, system replacement, discharge of accumulated water, embankment diversion and so on are described in detail, precautions of thesemethods in the application process are proposed and serious consequences caused by improper application of the technology extinguishingmethods are analyzed. The fire caused by oil pipeline explosion in the Dalian Oil Tankfarm is successfully put out by simple and effectivetechnology extinguishing methods, huge economic loss is avoid.