本文对３例颌下腺恶性肿瘤的误诊进行了临床分析。作者认为，对老年病人、无明显炎症病史的颌下区肿块不论术前诊断为何术中应一律送冰冻切片检查。颌下腺恶性肿瘤在行颌下三角清扫后，应加送切缘和可疑淋巴结作冰冻切片检查。门诊手术中冰冻报告为恶性肿瘤者最好立即进病房行扩大根治术。 In this paper, 3 cases of submandibular gland malignant tumor misdiagnosed for clinical analysis. The author believes that the elderly patients, no significant history of inflammation of the submandibular mass, regardless of preoperative diagnosis of surgery should be sent frozen section examination. Submandibular gland malignancies in the submandibular triangle cleaning should be added to send the margin and suspicious lymph nodes for frozen section examination. Outpatient surgery in the report of malignant tumors is best to immediately go to the ward to expand radical mastectomy.