［Objective］Lithium-sulfur（Li-S）batteries have garnered significant attention owing to their high theoretical energy density. However，their practical application is hindered by thesubstantial volume expansion of the sulfur cathode during charge-discharge cycling and the lithiumpolysulfide（LiPSs）shuttle effect，which collectively result in poor cycling stability and a short lifespan. Conventional non-aqueous poly（vinylidene fluoride）（ PVDF） binders are inadequate in mitigating these challenges.［Methods］A novel aqueous polymer binder for the sulfur cathode，TA-PEGDA-SBMA（TPS）， was prepared. This binder was synthesized via the ring-opening self-polymerization of hioctic acid（TA）， incorporating a short-chain polyether crosslinker（PEGDA） and a zwitterionic compound（SBMA）， with the aim of enhancing the electrochemical performance of Li-S batteries.［Results］The sulfur cathode employing the TPS binder exhibited an initial discharge specific capacityof 1 127. 6 mAh/g at 0. 25 C and maintained a capacity of 835. 1 mAh/g after 300 stable cycles， corresponding to a capacity retention of 74. 06%. Remarkably，it exhibited an outstanding rate capability，retaining a high discharge specific capacity of 833. 6 mAh/g even at a high current density of 2. 0 C. The sulfur cathode employing this binder exhibited an average peel strength of 1. 63 N，ensuring the structural stability of the sulfur cathode during charge-discharge cycling. Furthermore，its abundant polar functional groups and charged moieties effectively improved the“shuttle effect”of LiPSs.［Conclusion］ TPS binder can effectively suppress the volume variation of sulfur cathodes and theshuttle effect of lithium polysulfides（LiPSs）. Consequently，the TPS binder significantly improved boththe rate capability and cycling performance of Li-S batteries，offering a promising strategy for the development of high-performance，high-energy-density lithium-sulfur batteries.