ＣＴ证实并手术治疗的颅内蛛网膜囊肿２９例，结合文献对其临床特征和手术治疗效果进行分析。结果：发现病灶部位以中颅凹底和枕大池处最多见；年龄以儿童最多见；病程呈缓慢经过；手术过度分离易致出血、术后粘连等。认为病因方面主要以先天性蛛网膜发育异常为基础；手术以打通囊腔与蛛网膜下腔开放为原则，应严格掌握手术适应证。 CT confirmed and surgical treatment of 29 cases of intracranial arachnoid cysts, combined with the literature on its clinical features and surgical treatment results were analyzed. Results: The lesion found in the middle of the crescent and occipital cistern at the most common; the age of the most common in children; course of the disease was slow; over-segregated easily lead to bleeding, postoperative adhesions. That the main cause of the congenital arachnoid dysplasia based; surgery to open the cavity and subarachnoid space open for the principle should be strictly controlled indications.