Six patients(3 male,3 female)aged 33-66 yr, Course of disease 6-35 days, diagnosed with spontaneous intracranial hypotemion in Sir Run Run Shaw Hospital from November 2007 to May 2008,Were treated with on epidural autologus blood patch trader X-ray guidance. According to the results of CT myelography. the puncture site Was chosen in the 1-2 vertebral interspaees below the site of a single eerebrospinal fluid leak. For patients with multiple cerebrospinal fluid leaks.the procedure was performed at the spinal cord segment of the most severe leak. The mixture of augous blood and Omnipaque(300g/100 ml)at a ratio of 2:1 was injected into the epidural space to cover the spinal cord segment of the leaks under C-arm fluoroscopic guidance.Side effects were recorded during and after the injection of autologus blood.The treatment was repeated one week later if the former one failed.One patient was treated with epidural blood patch 3 times.and the rest 5 patients were treated with epidural blood patch 1 time.During the injeetion of autologus blood,5 patients complained of pain in the purtclure site,2 experienced pain radiating to the upper limb,2 felt,numbness in the right leg and all of these syndromes could be self-relieved.No side effects were observed after the injection of autologus blood.All the patients were Cured and no recurrence was observed during a 2-6 month follow-up.