In the present study, Fe3O4@S-CNTs-1, Fe3O4@S-CNTs-2 and Fe3O4@S-CNTs-3 were prepared via one-pot hydrothermal approach. The core-shell Fe3O4@S structures (20-30 nm) are embedded/coated on the oxidized CNTs, inhibiting the huge volume expansion effect of active materials during the cycling process. The Fe3O4@S-CNTs-2 cathode presented an initial discharge of 986 mAhg(-1) (0.2 C) and gradually decreased to 503 mAhg(-1) after 200 cycles, exhibiting the best cycling performance among the prepared hybrid materials. Even at a high current density of 1 C, the Fe3O4@S-CNTs-2 cathode still exhibited a discharge capacity of 914 mAhg(-1), and maintains a high capacity (466 mAhg(-1)) after 400 cycles. The Coulombic efficiencies of the synthesized Fe3O4@S-CNTs hybrid materials always are 99%, indicating they could effectively diminish the shuttle effects of polysulfide Li2Sn (2 < n < 8) intermediates in the cycling process. As for the rate performance of Fe3O4@S-CNTs hybrid materials, the capacity still can reach up to similar to 400 mAhg(-1) at a high discharge rate of 5 C. The synergy between the Fe3O4@S nanoparticles and oxidized CNTs in the Fe3O4@S-CNTs cathode endows the electrode with good electrical conductivity, structural stability and high charge capacity thus providing excellent electrochemical performance.