The invention provides a garbage incineration waste heat boiler capable of reducing contamination corrosion, and aims to reduce dust accumulation contamination of a heated face and then reduce the corrosion situation of the heated face by arranging a device capable of decreasing the content of dust in garbage incineration waste heat boiler flue gas on a boiler so that the phenomenon of contamination corrosion existing in the current garbage waste heat boiler can be effectively solved. The garbage incineration waste heat boiler comprises an incineration fire grate, flues, an evaporation pipe bundle, a superheater and an economizer, the flues are arranged in the positions, on the upper part of the incineration fire grate, of a boiler body, and the evaporation pipe bundle, the superheater andthe economizer are sequentially arranged behind the flues. According to the technical key points of the garbage incineration waste heat boiler, the flues comprise the first vertical flue, the secondvertical flue and the third vertical flue which communicate with one other in sequence, an efficient cyclone separator is arranged between the first vertical flue and the second vertical flue, and theefficient cyclone separator communicates with an ash residue cooler. According to the garbage incineration waste heat boiler, the phenomenon of contamination of the heated face of a follow-up devicecan be reduced obviously, and the follow-up device is prevented from deep corrosion due to contamination of the heated face.