Circulating fan heat preservation device capable of reducing heat loss

The utility model discloses a heat preservation device capable of reducing heat loss for a circulating fan. The heat preservation device structurally comprises a positioning frame, a heat preservation device, the circulating fan, a connecting end and a base. The lower end of the positioning frame is fixedly connected with the attemperator, a circulating fan is arranged in the attemperator and is in clearance fit with the attemperator, and the connecting end is communicated with the circulating fan; according to the heat preservation device for the circulating fan capable of reducing the heat loss, the heat preservation device is provided with a sealing device, an air layer, a heat insulation layer and other components, so that the heat preservation device can limit the position of the circulating fan through a newly added attaching layer and a frame body inside the heat preservation device; therefore, the sealing device can seal the internal temperature of the circulating fan inside through the air layer and