Waste heat circulating device of printing machine

The utility model relates to the technical field of waste heat circulation, in particular to a waste heat circulation device of a printing machine, which comprises a bottom plate, a heat preservation cover, a filtering mechanism, a temperature reutilization mechanism and a moving mechanism, the upper surface of the bottom plate is fixedly connected with a supporting column, and the upper surface of the supporting column is fixedly connected with the lower surface of the heat preservation cover. High-temperature gas generated by the printing machine can be filtered firstly and then conveyed into the heat preservation cover, the temperature reutilization mechanism is fixedly connected to the interior of the heat preservation cover, fresh air can be heated, the air reheating time can be shortened, the moving mechanism is fixedly connected to the bottom plate, moving of the device can be greatly facilitated, and the practicability is high. The side face of the filter layer is fixedly connected with a baffle, and