Abstract:In the present paper,the relationship between five flavors and channel tropism is statistically studiedfor 261 traditional Chinese drugs which are reported to have only one flavor in the Chinese Pharmacolreia (1990edition). The results show that in attribution there are considerable differences hatween the law of bitter and the law ofacrid ,between the law of sweet and the law of salty ,and between the law of acrid and the law of salty , while the lawsof other pairs of flavors are similar. The laws of channel tropism are considerably affected by the mergence of exteriorand interior channels. The relationship between five flavors and channel tropism is thus widely divergent from thatheld by the traditional theory of five elements.