公共图书馆社会教育作为我国教育体系的重要组成部分，在建设儿童友好城市的倡导下呈现出新的角色定位，面临新的价值提升契机。文章识别当前公共图书馆儿童社会教育现状，梳理政策视域下公共图书馆社会教育的角色定位，进而探讨价值提升方案。研究发现公共图书馆应探索以政府为主导、公共图书馆与家校合作、多主体参与的运行机制，面向广泛受众的“主导-参与”模式、面向特定地区的“区域联盟”模式、面向特定群体的“分工-协作”模式、面向垂直领域的“平台-合作”模式，打造互动、立体的公共图书馆社会教育系统，建立统筹、联通的公共图书馆社会教育体系。

Social education of public libraries as an important component of China's education system, has shown a new role positioning and faced new opportunities for value enhancement under the advocacy of building a children friendly city. This paper identifies the current status of social education for children in public libraries, clarifies the role positioning of social education of public libraries from the perspective of policies, and explores the value enhancement plan. This paper has found that public libraries should explore an operational mechanism led by the government, with cooperation between public libraries and schools, and multi subject participation. They should explore a "leading participation" model for a wide audience, a "regional alliance" model for specific regions, a "division of labor cooperation" model for specific groups, and a "platform cooperation" model for vertical fields. They should also create an interactive and three-dimensional public library social education system, establish a coordinated and interconnected public library social education system.