Objective:To investigate the risk factors of cerebral ischemic injury after endovascular coiling for unruptured intracranial aneurysms(UIA). Methods:A total of 274 patients suffered from UIA for coil embolization including cerebral ischemic injury were enrolled and divided into negative group(n=165) and cerebral ischemic injury positive group(n=109) according to the MRI or clinical manifestation. Their clinical data were selected and analyzed respectively. Single-factor analysis and logistic regression model were used to analyze the risk factors of cerebral ischemic injury after endovascular coiling for UIA. Results:The total rate of cerebral ischemic injury after endovascular coiling was 40%,34% of the patients with micro-embolism and 6% with neurological dysfunction diseases. Age(OR=2.547,95%CI=1.388 to 4.676,P=0.003),hypertension(OR=2.525,95%CI=1.307 to 4.881,P=0.006),hyperglycemia(OR=1.972,95%CI=1.050 to 3.701,P=0.035),previous stroke history(OR=9.325,95%CI=3.564 to 24.396,P<0.001),cerebral artery atherosclerosis patches(OR=3.680,95%CI=1.523 to 8.891,P=0.004),intraoperative blood clots(OR=17.031,95%CI=4.042 to 71.756,P<0.001) and procedure duration(OR=4.097,95%CI=2.126 to 7.894,P=0.007) associated significantly with cerebral ischemic injury and they were the risk factors of cerebral ischemic injury after endovascular coiling for UIA proved by logistic regression model. Conclusion:Age,hypertension,hyperglycemia,previous stroke history,cerebral artery atherosclerosis patches,intraoperative blood clots and procedure duration are the risk factors of cerebral ischemic injury after endovascular coiling for UIA.