AIM: To observe the effect of nimodipine on the severe brain injury. METHODS: Nimodipine was ccsed for acute severe brain injury patients early in 6 hours after wounded. The effect and safety were observed in an open trial. RESULTS: The mortality and morbidity of 20 patients decreased significantly by the use of nimodipine in comparisom with another 20 patients treated normally. CONCLUSION: Nimodipine is benefit to severe brain injury patients.