Organizational situational factors have a significant impact on employee behavior and performance. This study starts from organizational situational factors and explores the mechanism of the influence of error management atmosphere on employees忆 proactive change behavior. It analyzes the mediating role of harmonious work passion and the moderating effect of moderate leadership, and uses hierarchical regression analysis to empirically analyze data from 350 employee samples. The results show that the error management atmosphere positively affects harmonious work passion and further positively affects employees'proactive change behavior. Moderate leadership enhances the positive impact of the error management atmosphere on harmonious work passion, as well as the indirect impact of the error management atmosphere on employees'proactive change behavior through harmonious work passion. Based on this, the paper proposes corresponding management suggestions.