Objective To evaluate the relationship between the posterior cerebral artery (FTP) and posterior circulation transient ischemic by analyzing the head and neck CTA methods. Methods A total of 100 cases of head neck CTA scan in our hospital were selected with neurological symptoms such as dizziness and headache according to the results of CTA, and were divided into totally FTP group, partial FTP group and the control group. Clinical symptoms, presence of FTP and transient ischemic attack were compared. Results There were 36 patients with FTP, which accounted for 36%. There were symptoms of dizziness, headache, epileptic seizures, loss of consciousness, ataxia, nerve dysfunction, and the incidence was significantly higher than that of the control group,, the difference was statistically significant (P<0.05), in patients with complete FTP mutation in the right side (50%), on the left side of the variation is 35%, double the lateral variation accounted for 15%, 50% in patients with FTP mutation in the right side of the part, on the left side of the variation of 37.5%, 12.5% variation on both sides, were higher than the control group, the difference was statistically significant (P<0.05). FTP group in patients with transient ischemic 14 cases, accounted for 38.9%, type complete FTP are transient ischemic accounted for 30%, some FTP patients (50%), are higher than the control group, the difference was statistically significant (P<0.05). Conclusion FTP patients have symptoms of dizziness, headache, seizures, loss of consciousness, ataxia, neurological dysfunction, and the occurrence of an embryonic cerebral posterior artery, which is more likely to occur transient ischemic attacks.