The high efficiency coal additive consists of desulfurizer, leavening agent, combustion adjuvant, smoke suppressor and corrosion inhibitor mixed together. The desulfurizer contains CaO, NH4HCO3, ZnO and SiO2; the leavening agent contains NaHCO3, KAl(SO4)2 .12H2O and acidified coal gangue; the combustion adjuvant contains Fe2O3, MgO, KCl, KMnO4 and NaNO3; the corrosion inhibitor is humic acid and NaNO3; and the smoke suppressor is also KMnO4. The high efficiency coal additive is mixed directly with coal for boiler, furnace, kiln, oven, etc. Detection shows that the high efficiency coal additive can result in desulfurizing rate of 85 %, save coal rate by14.77 %, raise heat efficiency by 9.19 %, lower carbon content of coal slag by 14.86 %,and reduce smoke, scale and corrosion by 90 %.