Objective To explore the level of nursing team performance and its mechanism in tertiary public hospitals, and to provide references for improving nursing team performance. MethodsA survey was conducted using the Servant Leadership Scale for Nurse Leaders, the Employee Voice Behavior Scale, the Team Performance Scale, and the Workplace Fun Scale among 771 clinical nurses from five tertiary public hospitals. A structural equation model was utilized to verify the relationships among nursing team performance, servant leadership, nurses′ voice behavior, and workplace fun. ResultsThe overall score of nursing team performance in tertiary public hospitals was (4.33±0.59) points. Servant leadership positively influenced nursing team performance. Nurse voice behavior partially mediated the relationship between servant leadership and nursing team performance, accounting for 28.4% of the total effect. Workplace fun positively moderated the relationship between servant leadership and nurse voice behavior. The higher the level of workplace fun, the stronger the positive effect of servant leadership on nurses′ voice behavior and the stronger the mediating effect of nurses′ voice behavior. ConclusionNursing team performance in tertiary public hospitals is relatively high. Cultivating servant leadership in nursing managers, promoting nurse voice behavior, and creating enjoyable work environment can build high performance nursing teams.