The medium heat organic heat carrier furnace uses coal, oil, gas as fuels and heat transfer oil as a new type of thermal energy equipment for heating as the circulating medium. The high temperature circulating pump is used to force the heat transfer oil to perform a closed loop cycle, and the heat energy is returned to the boiler after the heating equipment is used. The heating process. Because it has the advantages of high temperature (above 320℃) and low pressure (0.3-0.5MPa), and its heating temperature can be accurately controlled, it can replace the original steam boiler for heating. At the same time, the equipment does not need water treatment equipment and there is no heat loss such as running, emitting, dripping and leaking of the steam boiler, so the one-time investment of medium heat products is low, and the operating cost is low. It is a safe, efficient and energy-saving heating equipment.