The invention provides an integrated type internal circulation gas heating device comprising a box, a combustion inner container, a combustor, a first heat dissipation device, a second heat dissipation device and an internal circulation draught fan. The box comprises a combustion chamber, a heat dissipation chamber, a back flow distributing chamber and a front flow distributing chamber. The firstheat dissipation device is wrapped on the outer side wall of the combustion chamber. The second heat dissipation device is located in the heat dissipation chamber and comprises multiple pipe and pressaluminum sheet assemblies arranged in a rectangular array. Multiple back baffles are arranged in the back flow distributing chamber. Multiple front baffles are arranged in the front flow distributingchamber. An air inlet of the internal circulation draught fan communicates with the space between the two adjacent front baffles located at the rightmost end. One end of an air outlet of the internalcirculation draught fan communicates with the combustion chamber. The other end of the air outlet communicates with the space on the right side of the front baffle located at the rightmost end. The right side wall of the back flow distributing chamber is provided with an air exhaust opening. Cooling and protection of the combustion inner container are achieved.