The utility model discloses an ammonia-containing tail gas purification device for soda ash production. The device comprises an ammonia-containing tail gas ammonia purification tower, wherein an ammonia-containing tail gas inlet, a carbon dioxide gas inlet, a washing liquid inlet, a washing liquid outlet and a purified tail gas outlet are formed in the ammonia-containing tail gas ammonia purification tower; wherein the ammonia-containing tail gas inlet and the washing liquid outlet are positioned at the lower part of the ammonia-containing tail gas ammonia purification tower, the washing liquid inlet is arranged at the upper part of the tower body corresponding to the washing section, the purified tail gas outlet is arranged at the top of the ammonia-containing tail gas ammonia purification tower, and an out-tower washing water circulation cooling mechanism is arranged at the upper part of the ammonia-containing tail gas ammonia purification tower. Through the structural design, the ammonia content in the discharged tail gas can be effectively reduced, meanwhile, the washing water consumption is saved, and particularly, the limitation that the washing water consumption of the tailgas cannot be increased in the combined-soda process is solved. By adopting the tail gas purification device disclosed by the utility model, the ammonia content in the purified and discharged tail gasis lower than 50mg/m < 3 > and reaches the world advanced emission level of the soda ash industry.