The utility model discloses a steam generation device. The steam generation device comprises a combustion unit and a flue communicated with the combustion unit, wherein a radiation section heat exchanger and a convection section heat exchanger are arranged in the flue in the flowing direction of heat generated by the combustion unit, and a superheat section heat exchanger is also arranged in the flue and is located between the radiation section heat exchanger and the convection section heat exchanger. The steam generation device further comprises a steam-water separator and a spraying device. The combustion unit comprises a combustion chamber, a fuel system, a natural gas system and a switching device used for switching between the fuel system and the natural gas system, wherein the fuel system and the natural gas system are communicated with the combustion chamber, and the combustion chamber is communicated with the flue. According to the steam generation device, due to the fact that a superheat section, the steam-water separator and the spraying device are additionally arranged, superheat steam can be generated, the requirement for viscous oil production at present can be met, and the economic benefit is good.