Objective To study the distribution regularity of TCM syndromes of respiratory failure of chronic obstructive pulmonary diseases （COPD） for the standardization research on TCM syndromes. Methods Literatures on respiratory failure of COPD of the latest 15 years were collected from the Chinese Biomedical Literature Database

Chinese Academic Periodical Full-text Database and China TCM Document Retrieval System Database. The name of the disease was filtered and standardized. The database was established. The formation and distribution regularity of TCM syndromes of respiratory failure of COPD were calculated and analyzed.Results The common syndromes of respiratory failure of COPD were excess in Biao-symptom

such as accumulation of phlegm and blood stasis

phlegm-heat obstructing the lung

accumulation of phlegm-turbidity in the lung

and phlegm misting the brain

and most cases were accompanied with blood stasis. The deficiency syndromes

commonly qi deficiency of the lung and kidney

were complicated in nature of disease and zangfu attribution.Conclusion The accumulation of phlegm and blood stasis

phlegm-heat obstructing the lung

accumulation of phlegm-turbidity in the lung

and phlegm misting the brain are the basic syndromes of respiratory failure of COPD

and most cases are accompanied with blood stasis. The deficiency syndromes have a complicated inner law

and qi deficiency of the lung and kidney is the common one.