目的　探讨年轻人脑梗死的病因。方法　对 2 5 2例 10～ 40岁脑梗死患者的病例进行调查 ,结合文献对年轻人脑梗死的病因、危险因素进行分析。结果　 2 5 2例中找到病因者 183例。发现病因及危险因素 32种 ,动脉粥样硬化者 10 5例 ,占 41.67%。动脉疾病者 40例 ,占 15 .87%。心脏疾病 13例 ,占 5 .16%。血液疾病或凝血机制障碍 12例 ,占 4.76%。有其他原因者 13例 ,占 5 .16%。另外 69例病因不详。结论　动脉粥样硬化是年轻人脑梗死的主要病因。高血压、高脂血症、吸烟、饮酒和脑血管病家族史是重要危险因素。其他常见病因有烟雾病、风湿性心脏疾病、血管畸形、感染性和非感染性血管炎、各种因素引起的凝血机制障碍 Objective To explore the etiology of cerebral infarction in young people. Methods A total of 2552 patients with cerebral infarction aged 10 to 40 years were investigated. The etiology and risk factors of cerebral infarction in young adults were analyzed. Results In 222 cases, 183 cases were found. 32 kinds of etiology and risk factors were found, 105 cases of atherosclerosis, accounting for 41.67%. 40 cases of arterial disease, accounting for 15.87%. 13 cases of heart disease, accounting for 5.16%. 12 cases of blood diseases or coagulation disorders, accounting for 4.76%. There are other reasons in 13 cases, accounting for 5.16%. Another 69 cases of etiology is unknown. Conclusion Atherosclerosis is the main cause of cerebral infarction in young people. Hypertension, hyperlipidemia, smoking, alcohol consumption and family history of cerebrovascular disease are important risk factors. Other common causes are moyamoya disease, rheumatic heart disease, vascular malformations, infectious and non-infectious vasculitis, coagulation disorders caused by various factors