In this experiment,artificially wounded yam tuber were cuerd with 1 mmol / L BABA with 1 mmol / L NaHCO3 at 35℃ for 7days. The occurrence and accumulation of lignin and suberin polyphenolics, the weight loss and lession diameter, phenolic metabolism and active oxygen metabolism related indexes at the cut sites of yam tuber, were measured to evaluate the effects of treatments .The results demonstrated treated by 1 mmol / L BABA with NaHCO3 could effectively reduce the decay of wounded yam tuber with lignin and suberin polyphenolics accumulation at the wounding sites through activation of the ROS and phenolic metabolism levels. It was suggested that the treatment can inhibit the infection of pathogens effectively during curing time,and advance the callus process in wound site.