In addition, laryngeal carcinoma was confirmed in 3 cases.Conclusion To the voice disorders of business dealers, prevention and correct phonation method are as important as their treatment.

• 结论对专业市场经商人员嗓音疾病不应只限于治疗，更重要的是早期诊断并引导正确发音方法和改变不良的社会习惯，改善市场环境。