Abstract: Aiming at the ignition and stabilizing combustion problem of low volatile coal, the constitution of ignition and combustion stability system and structure of burner with tiny-oil in abundant oxygen were introduced, and the principle of ignition and combustion stability was analyzed. The primary air flow field and temperature field of burning were numerically simulated and the features were further analyzed in detail. It has been verified by the analyzing that the intensity and speed of burning are improved and the time of ignition is shortened greatly with the help of abundant oxygen. After passing the nozzle of the burner, the pulverized coal-air in turbulence flows to the circulation zone and disperses in the same time, mixing rapidly with the hot flue gas, therefore favoring to the stabilizing combustion of low volatile coal. This result provides theory basis for the reform of the burner with tiny-oil in abundant oxygen in coal-fired power plant.