Gel composite solid electrolytes (GCSEs) boast both high ionic conductivity and exceptional interfacial compatibility, showcasing tremendous potential for use in solid-state sodium metal batteries. Nevertheless, the low concentration and widespread aggregation of sodium zirconium silicophosphate (NZSP) fillers within GCSEs constrain their effective utilization. This significantly diminishes ionic transport efficiency and structural integrity, thereby impacting the battery's rate capability and long-term durability. The research team led by Professor Xu Youlong at Xi'an Jiaotong University has introduced a hierarchical "skeleton optimization-in-situ polymerization" strategy. This approach involves treating NZSP fillers with KH550 to enhance their compatibility with the PVDF-HFP matrix, ensuring uniform dispersion and intimate interfacial contact. Consequently, this enhances ionic transport efficiency and structural integrity.