Abstract: An industrial technology of using sodium hydroxide solution to absorb hydrogen sulfide generated from barium chloride production to produce sodium sulfide was introduced and its feasibility was discussed from technical and economic perspectives respectively：sodium hydroxide solution with 380~420 g/L absorbed hydrogen sulfide in the packed tower，the reaction was end when mass concentration of sodium sulfide was at 330~350 g/L and the absorption rate of hydrogen sulfide reached at 95%~98%.It not only protects the environment，but also creates benefits for enterprises.

Key words: sodium sulfide, sodium hydroxide, hydrogen sulfide, sodium hydrosulfide