BackgroundClinical research competence determines the quality of clinical research and the reliability of research findings. We aimed to explore the clinical research implementation capabilities of breast cancer treatment departments in China. MethodsThis was a department-based cross-sectional study conducted in the form of electronic questionnaires on the Wenjuanxing platform from 7th August to 31st August 2023 among hospitals from the first batch of breast cancer standardized diagnosis and treatment quality control pilot centers in China. ResultsA total of 127 questionnaires from 122 hospitals were ultimately included in the analysis. Medical personnel involved in the clinical research of 118 (92.9 %) departments received good clinical practice (GCP) training. The steps of the approval process from research initiation to completion lasted 2–4 weeks or longer. The majority of departments initiated or participated in 2 or fewer clinical research projects over the past year. Among the differences between different departments, the Department of Medical Oncology had a better qualification profile and process and greater number of initiated and participated clinical studies than did the Department of Surgical Oncology. For needs and problems, most of the departments were strongly willing to undertake clinical research and receive professional training; the most common problem in the process of conducting studies was patient recruitment. ConclusionsMost departments generally exhibited complete capabilities for implementing clinical research. Improvements in implementation efficiency, quality of research and patient recruitment are still needed. Professional training and communication, as well as the recommendation of clinical research, are required in future development.