In order to study the influence of gasification temperature, gasification agents and blending ratios on gas component, low heat value (LHV), gasification efficiency and carbon conversion rate during co-gasification in a circulating fluidized bed, experimental tests were carried out with air vapor of room temperature heated to 500 ℃. Results show that the rise in gasification temperature can promote the carbon conversion rate and the gasification efficiency. The highest gasification efficiency of anthracite gasification alone is at 950 ℃ between the range of 800～1000 ℃, and the highest gasification efficiency of corn stalks sample of 20% blending ratio is at 850 ℃. With air vapor being the gasification agents, H2 increased from 1.80% to 15.53%. The addition of corn stalk promoted the generation of CO while inhibited the generation of CO2. But LHV, carbon conversion rate and gasification efficiency decreased when blending ratio exceeds 40%. With air being the gasification agent, the highest LHV appeared at 20% blending ratio, and with air vapor as the gasification agent, the highest LHV appeared when the blending ratio was 40%.