Hybrid solid electrolytes (HSEs) combining organic and inorganic phases are a promising candidate for high-performance solid-state batteries (SSBs) due to their high ionic conductivity, flexibility, electrochemical stability, compatibility with electrodes, and processability. However, the interface between ceramic electrolytes and polymer matrix often has Li+-deficient space charge layers due to the high potential difference, which hinders the transport of Li+ in HSEs and limits of ionic conductivity. Herein, we propose a strategy of constructing a polymer grafted layer on oxide particles, working as a coherent region to obtain a compatible interface with polymer electrolytes. The grafted Polymer layer can provide high throughput Li+ transport pathways across the LLZO/Grafted Polymer layer/Polymer electrolyte interface.