Based on reading the materia medica literatiure through the ages, the authors thought that the name of 'Cyathula Officinalis Kuan'was occured since Tang dynasty and the first book in which `Cyathula Officinalis Kuan ' was mentioned was ″Xianshou Lishang Xuduan Mifng″. The authors collected and sorted out the contents of Cyathula Officinalis Kuan from main materia medica literatures since Ming dynasty to now and studied the characteristics of `Cyathula Officinalis Kuan '. The results subjected that the d...