Pressurized turbulent circulating fluidized-bed (CFB) gasification of bituminous coal is successfully realized in a lab-scale fluidized-bed gasifier, and the effects of the stoichiometric ratio, steam/coal ratio, and preheated temperature of the gasifying agent on coal gasification characteristics are studied in this work. Experimental results prove the feasibility of a high-temperature air/steam-blown gasification process. The lower heater value is increased by 21%, when the preheated temperature of the gasifying agent is increased from 400 to 700 °C. When the stoichiometric ratio and steam/coal ratio increased, the component of syngas has a regular change according to the gasification temperature. With the increase of the stoichiometric ratio, the gasification temperature is increased, the H2 concentration increased first and then decreased, the CH4 concentration decreased, and the CO and CO2 concentrations increased first and vary little in the second stage because of the steady gasification temperatur...