The utility model discloses a heat accumulation formula denitration combustor, include: flare assembly, it includes the sub - flare assembly of first sub - flare assembly and second, the sub - flare assembly of first sub - flare assembly and second all includes upper and lower air regenerator and gas regenerator, the air hose subassembly, its respectively with first sub - flare assembly and the sub - flare assembly of second in air guide cavity intercommunication, the gas pipe assembly, its respectively with first sub - flare assembly and the sub - flare assembly of second in the 2nd air guide cavity intercommunication, denitration agent supply subassembly, its respectively with first sub - flare assembly and the sub - flare assembly of second in first reduction chamber and second reduction chamber intercommunication, the burning torch, it is from running through between air regenerator and the gas regenerator and extending to air jet and gas nozzle, the pipe assembly of discharging fume, its respectively with first sub - flare assembly and the sub - flare assembly of second in an air guide cavity and the 2nd air guide cavity switch on. Adopt this combustor realizing that high temperature flue gas waste heat utilizes the nitrogen oxide among the exhaust smoke outside the reduction simultaneously.