The invention relates to the field of heating devices, and particularly relates to a heating plate which is provided with a foamed polypropylene layer, a thermal diffusion layer and a carbon fiber heating cable which is arranged in the foamed polypropylene layer and the thermal diffusion layer. The surface of the carbon fiber heating cable is wrapped by an insulating layer. The insulating layer isadhered on the inner surface of the thermal diffusion layer through a heat conducting adhesive. The insulating layer is composed of the following substances according to the part by weight: 100 partsof crosslinked polypropylene resin by weight and 20-40 parts of metal oxide I by weight. The thermal diffusion layer is composed of the following substances according to the part by weight: 100 partsof polypropylene by weight, 10-40 parts of chopped carbon fibers by weight and 20-40 parts of metal oxide II by weight. According to the heating plate, the high performance carbon fibers are used asthe heating element and are not oxidized under the working state, and the coefficient of heat conduction of the foaming layer is low so that the heat is ensured to flow to the thermal diffusion layerto the greatest extent, the energy can be saved, the main material of the heating plate is polypropylene and the price is low and thus the practicality is great.