A heat transfer oil furnace is a gas heater that is directly inserted into an organic carrier (heat transfer oil) for heating, and the heated heat transfer oil is transported to the heating equipment through liquid phase circulation through a high-temperature oil pump. Then, the oil outlet of the heating equipment returns to the electric heating oil furnace for heating, forming a complete circulating heating system. The electric heating thermal oil furnace adopts a digital temperature controller for temperature control, with functions of over temperature alarm, low oil level alarm, and over pressure alarm