Efficient gas heating boiler

The utility model relates to an efficient gas heating boiler which comprises a burner and a gas-gas heat exchanger. The combustor is provided with a nozzle, a glow plug, a combustor air inlet, a vent hole, a spiral channel, a premixing cavity and a hearth; the gas-gas heat exchanger is provided with an exhaust gas inlet cavity, a gas-gas heat exchange cavity, an efficient gas-gas heat exchange unit, an exhaust gas outlet cavity, a waste gas outlet, a gas-gas heat exchange gas inlet, a gas-gas heat exchange gas inlet cavity, a gas-gas heat exchange gas outlet, a gas-gas heat exchange gas outlet cavity and an exhaust overflow opening. The boiler can effectively and accurately control the proportion of fuel and air; in the heating process, flames are rapidly ignited, and fuel can be completely combusted. The efficient heat exchange unit is used for heating gas, and has the characteristics of high heat efficiency, fast temperature rise, less exhaust pollution and the like. 本实用新型涉及一种高效气体加热锅炉，包括燃烧器和气气换热器；所述燃烧器设有喷嘴、