Vehicle-mounted tail gas temperature difference power generation heat exchanger

The invention provides a vehicle-mounted tail gas temperature difference power generation heat exchanger. The heat exchanger comprises a mounting base body. A device having the SCR function and a device having the noise reduction function are integrated into the mounting base body at the same time so that heat energy in high-temperature tail gas of an automobile engine can be recycled; and meanwhile, in the heat exchange process of the heat exchanger, compatibility between an automobile tail gas temperature difference power generation system and a tail gas emission system is improved. By means of the vehicle-mounted tail gas temperature difference power generation heat exchanger, the SCR function and the noise reduction function can be integrated; the problem that multiple devices are in tandem arrangement in the link of tail gas treatment is thoroughly solved; the integration degree is high; arrangement is easy to conduct; and a temperature difference power generation device can be applied to a commercial ve