Abstract: The pressing challenge of lithium-sulfur (Li-S) battery is their poor cycling stability because of the slow redox kinetics in cathode and lithium dendrites gowns in anode. Herein, we prepared multifunctional component doped 2D porous carbon nanosheets (Fe/Ni-N-PCNSs) successfully via a facile and template-free approach. Benefited from the ultrathin porous 2D structure and uniformly distributed bimetallic doping, Fe/Ni-N-PCNSs can effectively capture polysulfides, speed up sulfur redox reaction, and improve lithiophilic of carbon-based materials, greatly suppressing the shuttle effect of sulfur cathode and dendrite growth in lithium anode. As a result, Fe/Ni-N-PCNSs exhibit exceptional performance as stable hosts for elemental sulfur and metallic lithium, including a record long lifetime of 1000 cycles with a pretty infinitesimal capacity decay of 0.00025% per cycle in Li-S battery and an excellent cycling stability for over 850 h with a small overpotential of ≈72 mV in lithium metal battery. This work opens the exploration of state-of-the-art multifunctional-based 2D porous carbon nanosheets as stable hosts for both elemental sulfur and metallic lithium to improve Li-S battery performance.