This study presents a novel sulfur cathode for room-temperature sodium-sulfur (Na-S) batteries using linearly interlinked iron single-atom catalysts (IFeSACs) embedded in interconnected carbon channels. The IFeSACs, formed by iron atoms arranged in linear chains, act as efficient electron reservoirs, facilitating electron transfer to the sulfur cathode and accelerating reaction kinetics. The interconnected carbon channels enable rapid sodium ion (Na⁺) diffusion, enhancing the overall electrochemical performance. The combination of IFeSACs and carbon channels results in a sulfur cathode with high-rate conversion performance and excellent cycling stability. After 5000 cycles at a current density of 10 A g⁻¹, the Na-S battery retains a capacity of 325 mAh g⁻¹. The study demonstrates that the linear Fe-Nₓ-Fe structure enhances electron transfer and Na⁺ diffusion, leading to improved sulfur conversion and stability. The carbon channels also prevent polysulfide shuttle effects, contributing to the battery's long-term performance. The results highlight the potential of this design for high-performance, sustainable energy storage systems.This study presents a novel sulfur cathode for room-temperature sodium-sulfur (Na-S) batteries using linearly interlinked iron single-atom catalysts (IFeSACs) embedded in interconnected carbon channels. The IFeSACs, formed by iron atoms arranged in linear chains, act as efficient electron reservoirs, facilitating electron transfer to the sulfur cathode and accelerating reaction kinetics. The interconnected carbon channels enable rapid sodium ion (Na⁺) diffusion, enhancing the overall electrochemical performance. The combination of IFeSACs and carbon channels results in a sulfur cathode with high-rate conversion performance and excellent cycling stability. After 5000 cycles at a current density of 10 A g⁻¹, the Na-S battery retains a capacity of 325 mAh g⁻¹. The study demonstrates that the linear Fe-Nₓ-Fe structure enhances electron transfer and Na⁺ diffusion, leading to improved sulfur conversion and stability. The carbon channels also prevent polysulfide shuttle effects, contributing to the battery's long-term performance. The results highlight the potential of this design for high-performance, sustainable energy storage systems.