Current academic research on shared leadership has focused on the impact of shared leadership, with relatively little research on its causes and operational mechanisms. To fill this gap, this paper identifies, analyzes, and tests the emergent mechanisms of shared leadership. Firstly, by defining the concept, I constructed a theoretical model of the study based on theories such as social exchange. Secondly, I used SPSS 25.0 and AMOS 24.0 software to analyze the 227 valid questionnaires collected. The results show that team member exchange has a significant positive impact on the emergence of shared leadership, and self-efficacy plays a positive mediating role.