The invention discloses a multi-stage type ethyl alcohol combustion furnace which comprises a main furnace body, a preheating furnace body, a cold water supply pipe, a transition water pipe, a hot water outlet pipe, a transition smoke guide pipe and a smoke discharge pipe. The water outlet end of the cold water supply pipe is connected with the water inlet end of the preheating furnace body in a communicating manner, the water outlet end of the preheating furnace body is connected with the water inlet end of the main furnace body through the transition water pipe in a communicating manner, andthe water outlet end of the main furnace body communicates with the hot water outlet pipe. The multi-stage type ethyl alcohol combustion furnace is simple in structure and suitable for fuel, like ethyl alcohol, the hole diameters of multiple smoke outlet holes in a smoke flow dividing barrel are gradually decreased in the smoke outlet direction of the transition water pipe to balance the air pressure in the axis direction, and high temperature smoke in a smoke flow dividing column cavity penetrates the multiple smoke outlet holes more evenly.