Abstract: The combustion characters of Cr₂O₃-Al system, in which CrO₃-Al, Fe₂O₃-Al+MgO and Ti-C are added, have been researched. The ignition of Cr₂O₃-Al system is easy to carry out when CrO₃-Al and Fe₂O₃-Al+MgO are added in. When Ti-C additive is mixed in CrO₃-Al mixture, it has negative effect on the ignition of Cr₂O₃-Al system, but combustion becomes easy to be ignited when Ti-C igniter is put on the surface of mixture. Combustion temperature will increases with the increasing of CrO₃-Al, but it decreases when the additive quantity of CrO₃-Al is more than 20 percent. Combustion temperature also increases with the increasing of Fe₂O₃-Al+MgO.The increasing of Ti-C has a little effect on combustion temperature. Combustion velocity increases with the increase of these additives.