Aerosol generating device and heating structure thereof

The utility model discloses an aerosol generating device and a heating structure thereof. The heating structure comprises an inner pipe, a middle pipe, a heat exchanger and a heating body, the inner tube is provided with a containing cavity, and the containing cavity is used for inserting an aerosol forming substrate; the heat exchanger is connected with the inner pipe and provided with a plurality of air inlet holes at intervals, and the multiple air inlet holes are evenly distributed in the radial cross section of the heat exchanger. The heating body comprises a first heating body and a second heating body, the circumferential outer side of the heat exchanger is sleeved with the first heating body, the circumferential inner side of the first heating body is attached to the circumferential outer side of the heat exchanger, and the second heating body is arranged on the middle pipe. Due to the fact that the circumferential inner side of the first heating body is attached to the circumferential outer side of t