Abstract: NOxemission reduction technology of efficient pulverized coal fired industrial boiler was developed through drawing from advanced NOxemission reduction technologies at abroad. The coal gasification air classification of low NOxcombustion and flue gas recycling technologies were coupled. Through industrial test,it was found the technology decreased the NOxemission of boiler below 200 mg / m3 which could be kept under 100 mg / m3 by combining the coupled technology with SNCR flue gas denitration technology. The transformation improved NOxemission control ability of pulverized coal fired industrial boiler and met the new environmental protection standards of China.