The invention relates to a support frame for a multifunctional heating device. The support frame comprises a metal support sheet, gasket sheets, damping spring pieces, silicone rubber insulating gaskets, screws and nuts, wherein the two ends of the metal support sheet are connected with a power distribution box and a multifunctional heating device respectively through the gasket sheets, the damping spring pieces, the silicone rubber insulating gaskets, the screws and the nuts. Compared with the prior art, the support frame has the beneficial effects that the fixing hole of the multifunctional heating device support frame is paved with the metal gasket sheets, the elastic spring gaskets for controlling expansion coefficients, the high-temperature-resistant polytetrafluoroethylene insulating gaskets, the screws and the nuts for fixing, and the like, so that the thermal expansion coefficient of the heating device is reduced during working, the safety problem caused by thermal expansion during working of the heating device for the conventional power distribution cabinet and power distribution box is solved, the potential safety hazard of the heating device during use is avoided, and the properties of the country and people are prevented from being lost.