With continuous development of Mopanchang Carboniferous gas reservoir, formation pressure drops, production capacity of gas well carrying liquid weakeneds and bottom hole liquid loading has resulted in tubing casing pressure difference increase and production drawdown. Conducted is analysis on production status of each well in Mopanchang Carboniferous gas reservoir, and their water generation characteristics and adaptability of gas recovery by foam drainage, test are the foaming capacity and liquid carrying capacity of foaming agents and the compatibility with the formation fluid and selected is the UT-1 foaming agent to conduct field test in Chi 061-1 well and obvious effects are obtained. Experience obtained in Chi 061-1 well test can effectively guide other gas wells in gas recovery by foam drainage.