报告1例因吸入有毒气体苯乙烯致弥漫性肺泡出血病例。根据患者症状、体征及相关辅助检查结果,结合职业因素,一一排除,最终得以确诊,及时给予糖皮质激素、抗感染、止血及体位引流等综合治疗,取得较好疗效。提示弥漫性肺泡出血除常见的血管炎症及免疫系统疾病外,吸入有毒气体也是其中原因之一,临床上发现可疑之处一定要拓展诊断思路,避免误诊、漏诊。 One case of diffuse alveolar hemorrhage due to inhaled toxic gas styrene was reported. According to the patient’s symptoms, signs and related auxiliary examination results, combined with occupational factors, one by one rule out, eventually confirmed, and timely delivery of glucocorticoid, anti-infection, bleeding and body drainage and other comprehensive treatment, and achieved good results. Prompt diffuse alveolar hemorrhage in addition to the common vascular inflammation and immune system diseases, the inhalation of toxic gases is one of the reasons, clinically suspicious findings must expand diagnostic thinking, to avoid misdiagnosis, missed diagnosis.