The supply of teachers for after-school services through multiple collaborative efforts is the logical path for promoting high-quality after-school services during the deepening period of the"double reduction"policy.Based on the SFCI model,this paper demonstrates the connotation of collaborative governance of after-school serv-ice teacher supply,taking the imbalance between supply and demand of after-school service teachers and resource dependence among subjects as the logical starting point.It analyzes the practical obstacles to collaborative govern-ance of after-school service teacher supply,focusing on information asymmetry between subjects,non-correspon-dence between subject responsibilities and rights,and unclear division of labor among subjects.It also explains the promotion strategies for collaborative governance of after-school service teacher supply through the logical approach of value consensus among multiple subjects,division of labor and cooperation,and collaborative empowerment.