Abstract:The toxically study of Chinese herbal compound is one of key problems in traditional Chinese medicine (TCM).By reviewing toxicity of Chinese herb in TCM theory and drug matching theory in Chinese herbal compound,this paper considers that toxicity of Chinese herbal compound is adverse side of its efficacy and pharmacological function under the guide of Chinese medicine theory,and it also changes along with physical states.Thus the relation of mutual dependence and transformation always exists between efficacy and toxicity of Chinese herbal compound.By modern research of efficacy of Chinese herbal compound,the efficacy and toxicity theory of Chinese herbal compound will be better elucidation,which can provide scientific evidence for the rational and safe use of Chinese herbal compound in clinic.