Objective,2,To interpret the differences in the compilation methods and content of the part of diseases between the old and new editions of Traditional Chinese Medicine (TCM) National Standards-,Classification and Codes of Diseases and Patterns of Traditional Chinese Medicine,(GB/T 15657—1995) and ,Clinic Terminology of Traditional Chinese Medical Diagnosis and Treatment,(GB/T 16751—1997) for the purpose of promoting the application of the new editions of TCM National Standards.,Methods,2,Relational mappings of TCM disease terms in the new and old TCM National Standards were compiled for the statistical analysis and text comparison of the coding mode, naming standard, compilation style, inclusion scope, classification system and definition format.,Results,2,①The revised edition of ,Classification and Codes of Diseases and Patterns of Traditional Chinese Medicine, improved its coding mode by referring to its disease classification, which was simpler to understand, and much easier to expand terms due to its larger terminological capacity. All the terms of diseases and patterns realized one-to-one correspondence between code and term. ②The naming standard formulated in the new editions of TCM National Standards. All the terms of diseases followed the principle that one term corresponds to only one meaning. There were no square brackets or parentheses in the terms. The information in the brackets or parentheses in the old editions(GB/T 15657—1995 and GB/T 16751—1997) was expressed in hierarchical order or with optional words (i.e. synonyms). ③Compared with GB/T 16751—1997, the new editions of TCM National Standards had a separate line for each code, and also added an English translation of disease name and corresponding annotations for each term were added. ④One thousand three hundred and sixty-nine terms of disease names were included in the revised edition of ,Classification and Codes of Diseases and Patterns of Traditional Chinese Medicine, and ,Clinic Terminology of Traditional Chinese Medical Diagnosis and Treatment,-,Part, 1: ,Diseases,. The terms of disease names in new TCM National Standards were exactly the same and corresponded to each other. ⑤The new editions of TCM National Standards abandoned the classification system used in GB/T 16751—1997, and formed a disease classification system with basic elements of TCM etiology, pathogenesis and disease location, which was not only connected with the disease classification principles in WHO ICD-11, but also supported by TCM academic theories and unified with TCM clinical practice. The "symptomatic naming" in GB/T 16751—1997 was changed to "terminology for provisional diagnosis" . ⑥The new editions of TCM National Standards stipulated the format for term definitions. The definition of TCM disease terms should include the corresponding etiology, pathogenesis, disease location, characteristic symptoms and categories of the disease. Meanwhile, the terms to be defined should be divided into two categories: category words and specific terms. Descriptors for the definition of disease terms were also standardized.,Conclusion,2,Compared with the old editions, the new editions of TCM National Standards has been optimized and revised in terms of the coding mode, naming standard, compilation style, inclusion scope, classification system, definition format and other aspects of disease terms to better facllitate the quality evaluation, health management, health statistics and other TCM related work, and the new editions are more in line with the contemporary demands for medical informatics and TCM standardization and internationalization in China.