Abstract: 【 Purpose/significance】 The study analyzes the path of parent-child reading services in public libraries under the double re⁃ duction policy from a histological perspective, providing guidance for libraries to develop services in the new policy environment and a theoretical basis for the government to develop double reduction measures.【 Method/process】 The study uses the clear set qualitative comparison (csQCA) method to explore the impact of three dimensions of library service model, library-school cooperation and imple⁃ mentation of the double reduction policy on the library's parent-child reading services under the double reduction policy【. Result/con⁃ clusion】 The study identifies the foundational elements of parent-child reading services in libraries under the double reduction policy, as well as the paths of influence formed by each element, analyzes how libraries should target their services according to the different paths, and gives recommendations for implementation.【 Innovation/limitation】 The study offers a nuance policy view on parent-child reading promotion of the public libraries in China. However, this study is qualitative, which is limited in gauging the impact factors quantitatively.