The invention discloses a dual-combustion-supporting air-supply-type boiler combustion chamber which comprises a fuel gas burner, a boiler body, an air preheating box, heat-exchanging flue pipes, a flue gas collecting box, a flue exhaust pipe, a fuel gas supply pipe and a first combustion-supporting air supply pipe. The fuel gas supply end of fuel gas supply pipe and the air supply end of the first combustion-supporting air supply pipe are connected with the fuel gas burner jointly. A flame spraying opening of the fuel gas burner corresponds to the interior of a combustion chamber body of theboiler body, the flue exhaust end of the boiler body is connected with the multiple heat-exchanging flue pipes, and the multiple heat-exchanging flue pipes penetrate through a heat-exchanging cavity in the air preheating box. The structure is simple, the conical-circular-table-shaped combustion chamber body is adopted, an ignition cone is matched to guide common jet flames into a horn shape and tobe attached to conically-and-spirally-distributed heating pipes to advance, and the heating area of the heating pipes becomes larger through the flames.