Abstract: The present invention pertains to a liquid oxidizer of burner consisting of a hydrogen peroxide (H2O2) and a dihydrogen monoxide (H2O, water) . Wherein the proportion of the H2O2 is 30˜100% and the proportion of the H2O is 0˜70%. Whereby, the oxidizer is added into the burner and is subjected to decomposition or catalysis by heating or a catalyst so that it could be transformed into heating steam and gaseous oxygen. Accordingly, the oxidizer possessing the high oxidization accelerates the burning speed of blazing wastes within the burner, and the wastes and firing would be efficiently burnt away. Therefore, the burning effect is advanced, and the emission of carbon monoxide, unburnt hydrocarbon (UHC), and pollutants are certainly decreased.