Pulverized coal is an important fuel for blast furnace smelting, the basic properties of pulverized coal have a great influence on the stability of the blast furnace. The ash melting characteristics of three kinds of coal were measured by ash melting point analyzer. And the flammability of these three pulverized coals was analyzed by thermogravimetric analysis(TGA). The combustion rules of the three kinds of pulverized coal under the condition of oxygen blast furnace were simulated by the new blast furnace pulverized coal injection simulation combustion experimental device. At the same time, the activation energy of the pulverized coal was calculated by DAEM model. The results showed that the melting characteristics of the three pulverized coal could not meet the blowing requirements of the blast furnace. The coal A had the worst flammability and combustion rate, the apparent activation energy of coal A was 59.16 kJ/mol, and there was a compensating effect in the combustion process of coal.