Multi-fuel high efficiency thermal-air heating device

The invention provides a multi-fuel high efficiency thermal-air heating device. The thermal-air heating device mainly consists of an energy supplying device, a thermal-air generating device and a frequency conversion fan, wherein the thermal-air generating device consists of a box body, a burner, a heat exchanger tube, an air inlet fan and a grate; the energy supplying device is connected with an energy inlet in the thermal-air generating device through a pipeline, and the frequency conversion fan is connected with burners in the energy supplying device and the thermal-air generating device respectively through pipelines. The multi-fuel high efficiency thermal-air heating device has the effects that various energies can be used, so that the adaptability is strong; a large amount of electric energy can be saved for society, so that the expense of enterprises and peasants is reduced, and the production cost is reduced; the heat efficiency is high.