OBJECTIVE:To develop the statistical and analytical function of multiple items in the index system of western China drug use analysis and monitoring system on china pharmacy pharmainfo net(CPPN).METHODS:In accordance with the TCM theory of“theory,therapy,formula,and drug”,the classification and coding system of CPPN Chinese traditional medicines were established,which consisted of4sections,7levels and9digits including families,prescriptions,sub-prescriptions,minute sub-prescriptions,orders of drug names,preparation and route of administration.RESULTS&CONCLUSION:The coding and hierarchical system of chinese traditional medicines are in line with that of western medicine on CPPN,which can solve problems of“one medicine with multiple codes”or“multiple medicines with one code”,and it can also expand the utilization range of medicine information because of the coding on dosage form and route of administration,and the statistics and analysis on defined daily dose(DDDs)and prices etc.