Audit quality is the lifeline of auditing, and the role of audit supervision is inseparable from audit quality.Through astudy on the quality of internal audit in public hospitals in Beijing city and district, it analyzes the real problems of internal audit qual-ity and proposes effective ways to strengthen the process control of internal audit quality management in public hospitals, so as toachieve the purpose of improving the quality and effectiveness of internal audit work in public hospitals and play a role in promotingthe high-quality development of public hospitals.