In order to improve the room temperature conductivity and the performance in restraining the growth of lithium dendrites of polyethylene oxide （PEO）， ZrCl₄ doping modification method was used to improve the structural stability of sulfide electrolyte as active filler in PEO matrix. The sulfide material Li_6.10Zr_0.10P_0.90S₅Cl （LPSC-10） with ionic conductivity up to 1.90 mS /cm was optimized and selected as the filler for All-solid-state lithium battery （ASSLBs）. The results show that the PEO-based solid electrolyte has excellent properties， including high ionic conductivity （0.44 mS/cm， 60℃）， moderate Young''s modulus （13.7 MPa） and excellent interfacial stability. The Li|Li （0.1 mA/cm² for 600 h） and Li|LiFePO₄ batteries at 60℃ （capacity maintained at 99.2% after 200 cycles at 2C） have excellent cycle stability. This work is expected to promote the development of ASSLBs with high electrochemical performance and provide reference information for the further development of battery technology of the rocket and others.