Objective Through systematic evidence retrieval and literature quality evaluation,the best evidence for respiratory muscle training in patients with chronic obstructive pulmonary disease (COPD) was extracted and summarized,so as to provide research-based evidence for respiratory muscle training in the clinical settings. Methods The evidence search was performed across 17 databases and official websites systematically,including UpToDate,BMJ Best Practice,Joanna Briggs Institute Library,Cochrane Library,British National Institute for Health and Care Excellence,Registered Nurses’ Association of Ontario,Canada,British Thoracic Society,Canadian Thoracic Society,American Thoracic Society,Thoracic Society of Australia and New Zealand,Web of Science,PubMed,Embase,Sinomed,CNKI,and Wanfang Database. The guidelines,expert consensuses,evidence summaries,systematic reviews,and randomized controlled trials were included. The retrieval timeframe was ranged from the establishment date of the databases or websites to October 31,2020. All literature was independently evaluated by 2 researchers,and they determined whether the literature met the standards and then extracted the data. Results A total of 12 pieces of literature were eligible for inclusion. They were 2 guidelines,2 expert consensuses,2 evidence summaries,and 6 systematic reviews. There were 21 pieces of best evidence with 7 dimensions being summarized,namely training purposes,training subjects,training places,training plans,training methods,quality control,and effectiveness evaluation. Conclusion The best evidence of respiratory muscle training in patients with COPD was summarized. It is recommended that health care professionals should fully consider the allocation of medical resources when they apply the evidence and formulate individualized and feasible training programs based on the needs and preferences of patients.