Abstract:The antiarrhythmia actions of aqueous extract of Rhizoma Seu Radix Notopterygii(No-to Pterygium incisum Ting ex H. T. Chang) were studied in arrhythmia mice and rats induced by ivaconitine, and in arrhythmia rabbits induced by chloroform and adrenaline. The results show that the aqueous extract has a significant antiarrhythmia action on the experimantal animals and this action was not from its minerals.