The invention discloses a high-efficiency gasifying incinerator, and relates to furnaces. The high-efficiency gasifying incinerator comprises an incinerator body, a heat preservation layer, an incinerator liner, an incinerator chamber as a destructive distillation gasifying room, a feed opening, a breeze regulating hole, incinerator grates, a fire rod, a cone-shaped incinerator basin as an inverted burning room, fire penetrating pipes, a water bag, an air inducing machine and a chimney, wherein the air inducing machine is connected with the chimney. The high-efficiency gasifying incinerator disclosed by the invention has the benefits that after firing, air is induced by the air inducing machine and compensated through the breeze regulating hole, an anoxic destructive distillation condition exists in the incinerator chamber, and a lot of flammable gas is generated by pyrolysis and gasification; when the air is induced downwards by the air inducing machine, a violent oxic inverted-fire burning condition exists in the cone-shaped incinerator basin, so that the temperature in the incinerator chamber above the cone-shaped incinerator basin is raised, and the pyrolysis and the gasification in the incinerator chamber are further facilitated; any burning-supporting material is not needed in the incinerator chamber, and the burning of the flammable gas is generated by the pyrolysis and the gasification of garbage; an inverted burning flame penetrates through the fire penetrating pipes and heats water in the water bag and can supply hot water and can be used for heating; the destructive distillation gasifying and the inverted burning are organically combined by the high-efficiency gasifying incinerator, the burning is sufficient, smoke and dust are not generated, the garbage is efficiently treated in an environment-friendly manner, and the high-efficiency gasifying incinerator is particularly suitable for the incineration of domestic garbage and medical garbage.