建立优质文化资源直达基层机制是公共图书馆的时代责任与业务创新点。文章基于公共图书馆优质文化资源直达基层的现有实践，从资源配置、需求对接、基层承接、成本效率四个维度，探究直达基层的机制性障碍；通过完善资源下沉与基层内生动力协调机制，在优质资源汇聚、数智赋能驱动、加强多元合作、完善政策供给、激发内生动力等方面发力，以促进公共图书馆优质文化资源直达基层机制完善。

Establishing mechanisms to deliver high-quality cultural resources to reach grassroots constitutes both a contemporary responsibility and an area of service innovation for public libraries. Based on existing practical explorations by public libraries in building mechanisms for high-quality cultural resources to reach grassroots, this paper explores the institutional barriers to such direct delivery from four dimensions: resource provision, supply-demand matching, grassroots reception capacity, and cost efficiency. It argues that coordination mechanisms between resource downflow and grassroots endogenous motivation should be improved, with efforts focused on aggregating high-quality resources, leveraging digital and intelligent empowerment, improving multi-dimensional cooperation, improving policy provision, and stimulating endogenized driving, so as to promote the improvement of mechanism reform for high-quality cultural resources to reach grassroots by public libraries.