The invention discloses a hawser airbag heating device and relates to the technical field of bridge construction engineering. The hawser airbag heating device comprises a heating layer with heating wires, and a heating and pressurizing cushion, wherein the heating and pressurizing cushion is composed of the heating layer, a heat insulation layer and an air bag, and the heat insulation layer and the air bag are sequentially stacked on one side of the heating layer. A plurality of annular tightening strips are arranged on the air bag at intervals, each annular fastening strip fastens from one side edge of the air bag to the other side edge, one end of each annular fastening strip is connected with a tension buckle, and the other end is provided with a fastening strip extending portion extending out of the side of the air bag to be fastened with the tension buckle. The heating and pressurizing cushion is provided with a sensor unit electrically connected with a controller. Compared with the prior art, the heating surface is stressed uniformly, and the problem that an existing heating device is easy to cause non-uniform stress on overlapped positions and loose adhesion to influence sealing effect and increase reworking rate when heating hog-press self-bonding adhesive tape winding on a hawser is solved.