[Objective] To observe the clinical therapeutic effect of Yanyan Decoction on treating yin deficiency of lung and kidney chronic pharyngitis . [Methods] 120 cases of patients were randomly divided into treatment group(60 cases) which treated with Yanyan Decoction and control group(60 cases) which treated with Jinguo drink.[Results] The total effective power was 80.00% in the treatment group and 63.33% in the control group .Two groups of patients total effective rates had difference of statistical meaning .[Conclusion] The effect of Yanyan Decoction in the treatment of yin deficiency of lung and kidney chronic pharyngitis is significant,it is worthy of clinical promotion.