The invention discloses an oil-gas organic heat transfer furnace, which comprises a barrel body and a coiled pipe; the barrel body is a box body with a quadrate cross section; and the coiled pipe is a quadrate box shaped coiled pipe which is formed by connecting a plurality of linear single pipes and is provided a quadrate cross section in whole. According to the oil-gas organic heat transfer furnace disclosed by the invention, a radiating section of a combustion chamber adopts a structure of the quadrate box shaped coiled pipe and is formed by welding and assembling bent steel pipes, thus, requirements for the equipment is low, the production can be convenient to carry out, and common medium and small-sized boiler plants can produce large-scale organic heat transfer furnaces; moreover, a convection section has the structure formed by a plurality sections of snake-shaped convection pipes; the oil-gas organic heat transfer furnace has the effects of gas sweeping and heat exchange superior to the coiled pipe clearance sweeping; and an air preheater is integrated into the boiler body, thus, little loss is generated in heat dissipation, the structure is simple, and lower resistance is brought by the gas and the air.