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【目的】探讨分析动脉瘤性蛛网膜下腔出血（aSAH）并发脑血管痉挛（CVS）的相关危险因素，为临床预防aSA H后CVS的发生提供临床参考。【方法】对本院收治的300例aSA H患者的临床资料进行回顾性分析，以未发生CVS的患者为对照组，以发生CVS的患者为观察组，根据两组患者相关临床资料，分析导致aSAH患者发生CVS的相关危险因素。【结果】300例 aSAH 患者共有85例患者发生 CVS ，发生率为283．3％。同时经单因素及多因素分析，Fisher分级＞2级及年龄＞50岁均为导致aSA H患者发生CVS的危险因素（ P ＜00．5）。【结论】CVS有较高的发病率，在aSAH患者的临床治疗过程中，对存在导致CVS发生危险因素的患者，应严密观察其病情变化，并及时给予对症治疗。“,”Objective] To investigate the risk factors of cerebral vasospasm (CVS) after aneurysmal sub‐arachnoid hemorrhage (aSAH) ,and to provide clinical reference for clinical prevention of CVS after aSAH .[Methods] The clinical data of 300 patients with aSAH was analyzed retrospectively .The patients with CVS were classified as the observation group ,and the patients without CVS were classified as the control group . The risk factors of developing CVS after aSAH were analyzed according to clinical data of the two groups .[Results] The rate of incidence of CVS after aSAH was 28 3.3% .According to single‐and multi‐factor analy‐sis ,Fisher grade >2 grade and age >50 years of age were the risk factors ( P <0 0.5) for patients with CVS .[Conclusion]The incidence of CVS after aSAH is considerably high .In the clinical management of aSAH ,the patients with risk factors of developing CVS should be closely observed and given timely symptomatic treat‐ment .