The utility model provides a boiler skirt which comprises an annular housing washer, wherein, the inner side of the housing washer is provided with a heat resistance layer corresponding to the shape of the boiler; the heat resistance layer comprises a plurality of heat resistance films; adjacent heat resistance films form a hot air flow channel which can lengthen the time of hot air flow passing by the boiler, and two ends of the hot air flow channel are communicated with the outside. As the heat resistance layer corresponding to the shape of the boiler is arranged at the inner side of the boiler skirt, when in use, the boiler is put in the boiler skirt; the hot air flow channel forms between the adjacent heat resistance films on the heat resistance layer so as to enable the hot air flow generated when burning gas to flow along the channel, thereby better preventing heat energy from radiating around. In addition, as the hot air flow channel can lengthen the time of the hot air flow passing by the boiler, the heat energy can be more effectively transferred to the boiler bottom, thereby improving the capacity factor of the heat energy.