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Li-S batteries have shown great potential as secondary energy batteries.However,the side reaction be-tween Li anodes and polysulfides seriously limited their practical application.Herein,the artificial pro-tective film,which is consisted of Li-Nafion and TiO2,was designed and successfully prepared to achieve a corrosion-resistant Li anode in Li-S battery.In the composite protective film,the Li-Nafion could effi-ciently prevent the contact between Li anodes and polysulfides,and the incorporation of TiO2 nanoparti-cles into the Nafion could significantly increase the ionic conductivity and mechanical strength of the pro-tective film.Li-Li symmetric cells with an optimal artificial protective film exhibited an extended cycle-life of 750 h at a current density of 1 mA/cm2 in Li2S8 electrolyte.Moreover,the Li-S full battery with an optimal protective Li anode exhibited higher capacity retention of 777.4 mAh/g after 100 cycles at 0.1 C as well as better rate performance than the cell with a pure Li anode.This work provides alternative insights to suppress the side reaction for Li-S batteries with high capacity retention.