Abstract: In order to solve the problems of coking and high initial NOX concentration in the municipalsolid waste ( MSW) incinerator,high temperature and low oxygen combustion technology in the furnaceof MSW incinerator was adopted,and its feasibility was discussed. Eleven high temperature and lowoxygen nozzles were set on the front arch of the conventional waste incinerator. Four cases with differentflow rates at 60,50,40 and 30 m/s respectively were investigated by computational fluid dynamic( CFD) numerical simulation. The results show that with the jet velocities of 60 m/s and 50 m/s,theentrainment and mixing capability of the jet fluid is stronger. The leading edge of jet can almost reachthe surface of the grate,and the resulting flow vortex covers the high temperature section of the maincombustion area ( the combustion section on the grate) . The gaseous components are mixed much moreevenly in the main combustion area with the oxygen concentration in the range of 6.5% ~7.0% ( volumefraction) . The temperature profile in the main combustion area ( about 1 200 K) is more uniform andcharacterized by smaller high-temperature-zone,which can help reduce the coking risk and the initialNOX concentration in the incinerator. Close-