Abstract:[Abstract] Objective:To evaluate the effect of CT-guided high voltage pulse and standard voltage pulse radiofrequency of trigeminal semilunar ganglion of postherpetic neuralgia in the head and face. Methods 60 patients with postherpetic neuralgia in the head and face, aged 52-76 years, 20 males and 40 females, were randomly divided into two groups: high voltage group (H) and standard voltage group (B); VAS before treatment, 3 days, 1 week, 4 weeks, 8 weeks and 12 weeks after treatment were recorded in the two groups, the number of remedial treatment ≥ 2 cases. Efficacy evaluation and adverse reactions were observed after 8 weeks . Results: Compared with before treatment, the VAS scores of the two groups were significantly lower at 1 day, 1 week, 4 weeks and 8 weeks after treatment, the difference was statistically significant (P < 0.05); the number of remedial treatment cases in group H had no significant difference compared with in group B; no adverse reactions occurred in two groups. Conclusion: CT-guided is safe and effective to treat the postherpetic neuralgia of the head and face .