【Purpose/significance】 Although the connotation of the accessibility theory is often conducted in China's policy and prac⁃

tice of public cultural services, its formulation is not universal. The promotion of the concept of accessibility and the construction of

the theory of accessibility of public cultural services are of great importance.【Method/process】 Research collects main public cultural service policies in China in recent years, analyzes policy texts by rooted codes, sorting out the mechanism for improving accessibility by model based on open coding, spindle coding and selective coding, and establishing a theoretical framework for realizing the accessi⁃bility of public cultural services.【Result/conclusion】 The main ways to achieve accessibility are to expand supply, optimize the alloca⁃tion and layout of resources and services, innovate service models and promote standardization construction, substance of which is the unity of quantity and quality, individuality and commonness, time and space, and elements and systems, then development strategies are put forward.【Innovation/limitation】 The research uses a grounded method to study the accessibility theory from the perspective of China's policy text，innovated compared with paper analysis or questionnaire survey. The research puts forward the mechanism and de⁃velopment suggestions for improving accessibility, which has inspiration for improving the theoretical system. The limitation is that the number of samples is small and the scope is too macro only from the policy text analysis.