Abstract:To observe effect of Buyang huanwu Decoction on Neurological Severity Score(NSS) of MCAo model rat. Methods:MCAo rat models were reproduced by Intraluminal Suture. Twenty survivals were classified into two groups after 2 weeks: model group (n=10) and Buyang Huanwu Decoction group (n=10), in comparison with other ten normal rats. Each rat was scored by NSS at baseline, week2, week4, and week6. Results:Model rats showed neurologic deficits and decreased NSS scores compared with normal rats (P<0.01). The neurologic deficits showed certain degree of spontaneous recovery. The score of Buyang Huanwu Decoction group were significantly higher than those of model group at different time points (P<0.01 or P<0.05). Conclusion: Buyang Huanwu Decoction can improve Neurological Severity Score in MCAo model rats.