This thesis studied on the classification coding technology of Chinese medicines, which applied numbers to convey the specific information of source, medicinal part, specification and processing method of Chinese medicines, etc. By exploring the regular pattern of this coding technology, the study was to make coding rules of top-level design for Chinese medicines, which were used to classify and encode Chinese medicines according to different sorts such as Chinese materia medica, decoction pieces, granule and various specifications and processing methods. Depending on the rules, a computer language of “one name-one object-one code” mode was generated and was named “dictionary database”. It may serve informatization promotion of traditional Chinese medicine service, trade, clinical treatment, education, scientific research and management of traditional Chinese medicine.