The utility model relates to household garbage incineration treatment equipment and in particular relates to a household garbage pyrolyzing and gasifying furnace. The furnace is characterized in that a furnace body comprises an incineration furnace shell, a fireproof brick layer and an incineration furnace liner from outside to inside, wherein a slag discharging part and a water seal part are arranged at the bottom of the furnace body; an air inlet and a combustible gas outlet are formed in the upper part of the furnace body; a water steam inlet is formed in the bottom of the furnace body; a water steam outlet is formed in the top of the furnace body; a hollow interlayer is arranged between the fireproof brick layer and the incineration furnace liner; the bottom of the interlayer is communicated with the bottom in the furnace body, and the upper part of the interlayer is communicated with the combustible gas outlet; an air inlet channel is formed in the interlayer, the upper part of the air inlet channel is communicated with the air inlet formed in the upper part of the furnace body, and the lower part of the air inlet channel is communicated with the bottom in the furnace body. According to the furnace, municipal solid wastes can be pyrolyzed into combustible gas and furnace slag, the generated combustible gas can be recycled, and the generated furnace slag can be used as building aggregates.