<p>In contemporary society, the police are an important force in maintaining social order and ensuring national security. Moral behaviors during law enforcement affect the public’s trust in and evaluation of law enforcement agencies. Ethical Leadership plays a significant role in shaping the moral behaviors of organizational members. Based on sociological theories, this paper explores the relationship between Ethical Leadership and Moral Disengagement, while analyzing the moderating roles of Ethical Stress and Supervision in this relationship. Through the design of a questionnaire, the survey samples involve police officers from multiple regions in China, including Beijing, Shanxi Province, and Hebei Province. After a rigorous screening and sorting process, 777 valid questionnaires were finally confirmed. Data processing and statistical analysis were conducted using SPSS Statistics 28.0 and the SPSSAU online platform. The study found that Ethical Leadership has a significant positive impact on Moral Disengagement, and both Supervision and Ethical Stress play important moderating roles in the relationship between Ethical Leadership and Moral Disengagement. Specifically, the Supervision mechanism can strengthen the positive impact of Ethical Leadership on Moral Disengagement behaviors, and Ethical Stress will enhance the positive impact of Ethical Leadership on Moral Disengagement. To improve the moral management level of the police force, it is suggested to optimize the leadership model, reasonably regulate police officers’ Ethical Stress, and improve the Supervision mechanism. These findings provide theoretical support and specific guidance for social development and policy-making.</p>