我国公共文化服务体系建设中坚持政府主导与社会力量参与相结合，政府与社会力量的有效互动对提升公共文化服务效能有直接影响。文章以Z市“乡村舞台”建设为案例，从微观层面聚焦公共文化服务供给中政府与社会力量的互动机理。研究发现，政府与社会力量互动在不同阶段呈现差异化的互动机理。首先政府与社会力量互动的促成源自政府动员，具体以政策导向、行政推动与资源整合为实现机制；互动运行阶段的合作化供给，以互补增强为基础、以项目制运营为方式、以监督规范为保障。随着多元主体协同合作的推进，深化阶段的协同共治主要通过推动社会化发展与激发群众自主参与实现有机互动，未来我国公共文化服务供给中政府与社会力量的有效互动还存在诸多障碍，仍需持续加大理论和实践层面的探索以期最终实现共建共享的文化治理格局。

In the construction of China's public cultural service system, we should adhere to the combination of government leading and Participation of social forces. The effective interaction between government and social forces has a direct impact on the efficiency of public cultural service. This paper focuses on the interaction mechanism between the government and the Social forces in the supply of public cultural services, taking the "country stage" construction of Z city as an example. It is found that the different stages of interaction between government and society forces ,which has different interaction mechanism. First of all, the interaction between the government and social forces comes from the government mobilization, with policy guidance, administrative promotion and resource integration as the realization mechanism; the cooperative supply in the interactive operation stage is based on Complementary and enhancement as the basis ,project’s operation as the way, and the supervision as the guarantee. With the promotion of multi-agent cooperation, the deepening stage of collaborative governance mainly realizes organic interaction by Socialization and encouraging the masses to participate in the construction management. In the future, there will be many obstacles in the effective interaction between the government and social forces in the supply of public cultural services in China. It is still necessary to continue to increase the exploration on the theoretical and practical levels, so as to finally realize the co-construction and sharing of cultural governance pattern.