To investigate the effect of oral administration and medicine bath of BuYangHuanWu decoction on the Sciatic Nerve Conduction Velocity(SNCV). Method: 60 Sprague Dawley rats whose left sympathectic ganglion were exposed were divided into two groups. The rats in the experimental group take oral administration and medicine bath of BuYangHuanWu decoction . The SNCV were measured both before and after operation. Results:The SNCV in the experimental Group were significantly faster than those in the control group A(p<0.01) after treatment for 2,4,6 weeks. Conclusion: It is beneficial to improve the SNCV by oral administration and medicine bath of BuYangHuanWu decoction.