The relationship between drug's Characteristics and the contents of trace elements in Chinese medicinal herbs was studied. 42 kinds of trace elements in 105 Chinese medicinal herbs were determinaed. Factor analysis was applied to study the distribution characteristics of 42 kinds of trace elements in 105 Chinese medicinal herbs. The results of factor analysis showed that a ten-factor model interpreted the correlation of these trace element. The result of Q-type cluster analysis showed that the samples could...