Objective To develop the Home-Based Pulmonary Rehabilitation Training Barrier Scale for Adults with Chronic Respiratory Diseases and to test its reliability and validity.Methods A preliminary scale was developed through literature analysis, qualitative interviews, two rounds of Delphi expert consultation, and cognitive interviews.Exploratory factor analysis and reliability and validity assessment were conducted on 235 patients with chronic respiratory diseases, and confirmatory factor analysis was performed on 241 cases.Results Home-Based Pulmonary Rehabilitation Training Barrier Scale for Adults with Chronic Respiratory Diseases consisted of 21 items across five dimensions: personal knowledge influence, personal behavior influence, family influence, organizational influence, and public health policy influence, with a cumulative variance contribution rate of 75.516%.The confir-matory factor analysis model fit well (χ2/df=2.177, RMSEA=0.073, TLI=0.934, IFI=0.945, CFI=0.945, GFI=0.873).The content validity index (I-CVI) of the scale was 0.833-1.000, and the average content validity index (S-CVI/Ave) was 0.991, with the universal agreement content validity index (S-CVI/UA) at 0.900.The overall Cronbach′s α coefficient of the scale was 0.938, the split-half reliability was 0.875, and the test-retest reliability was 0.950.Conclusion The Home-Based Pulmonary Rehabilitation Training Barrier Scale for Adults with Chronic Respiratory Diseases has good reliability and validity and can provide a reference for assessing the barriers to home-based pulmonary rehabilitation in patients with chronic respiratory diseases.