Microlaryngoscopic operations were performed on 300 cases of very small lesions of the vocal cord from October 1985 to December 1987 under high frequency ventilation (HFV) and compound venous anaesthesia. 233 cases were followed up for at least 1 month after operation. Among them, 91% recovered completely or improved significantly. The indications, contraindications, anaesthesia, surgical procedures, complications, results, merits and disadvantages of the microlaryngoscopic surgery were discussed in detail.