The invention discloses a semiconductor temperature difference power generation fuel oil fan heater. The semiconductor temperature difference power generation fuel oil fan heater comprises a shell, acombustion chamber is arranged in the shell, a combustor is arranged in the combustion chamber, an inlet is formed in the front end of the combustor, multiple smoke outlets are formed in the rear endof the combustor, the smoke outlets communicate with space in the combustion chamber, a smoke channel is formed between the outer wall of the combustor and the combustion chamber, a smoke outlet is formed in one end of the combustion chamber, and the smoke channel is connected with a smoke cylinder through the smoke outlet, a temperature difference power generation module is arranged on the outerwall of the combustion chamber, and a twisting tooth type spiral fin radiator is arranged on the temperature difference power generation module. According to the device, electric amount can be generated while user heating is achieved, the electric amount is used for a power device, a parking heater with temperature difference power generation can sufficiently use the energy, and the semiconductortemperature difference power generation fuel oil fan heater can be widely used for heating of trucks, passenger cars and the like.