The invention belongs to the technical field of coal combustion additives, and in particular relates to a coal economizing agent. The invention solves the problems of unobvious coal economizing effect, high addition level, pollution of the environment and non-compliance of Green blackness of the existing coal economizing agents. The coal economizing agent is prepared from the components in parts by weight: 22-26 parts of a combustion adjuvant, 28-41 parts of a mixed type strong oxidizer, 18-26 parts of a dispersing agent, 2-5 parts of a catalyst and 15-25 parts of a compound sulfur-fixing agent. The coal economizing agent disclosed by the invention can improve the combustion conditions of a furnace body and increase the air permeability of a coal layer, thus enabling sufficient combustion of coal, improving the coal-burning heat efficiency, reducing discharge amount of smoke, improving the thermal conduction efficiency, fixing sulfur to reduce smoke, reducing emission of CO, SO2 and the like, reducing environmental pollution, and achieving the purposes of combustion supporting, sulfur fixing, energy saving and desulfurization.