The invention belongs to a catalytic combustion-supporting additive for fire coals of a pulverized coal boiler of a fuel electric plant use, which is composed of powder and liquor. The manufacturing and the using of the additive is realized according to a mechanism that coal is pulverized to powder by a pulverizer and then is blown into the boiler for combustion, and the application of properties of high dispersivity, high permeability, and high catalysis of a high energy catalyst. The manufacturing method of the additive comprises the following steps: firstly, preparation of the powder, and secondly, preparation of the liquor. The using method of the additive is as follows: adding the additive into coals directly, and sending into a coal pulverizer to operate, so as to improve the quality of the pulverized coal, increase the activity of the pulverized coal, and promote the pulverized coal to combust fiercely and fully in the boiler; and spraying the liquor in vaporous to a high-temperature fire zone in the boiler to react with the baking-hot coal, so as to generate water gas to participate in and help the combustion to emit strong heat. The additive has the advantages of small dosage, good effect, and convenience in using, helps to combust efficiently, and has the effect of decoking and deashing.