Graphene,　with　excellent　electrical　conductivity　and　high　theoretical　capacity,　may　be　one　of　the　promising　anodes　for　rechargeable　batteries.　However,　several　drawbacks,　such　as　low　initial　coulombic　efficiency　(ICE)　and　limited　actual　reversible　capacity,　hamper　their　further　development.　Herein,　a　sulfur-doped　reduced　graphene　oxide　(rGO)-based　composite　with　low-content　Sb2S3　is　synthesized　through　in-situ　sulfuration　process,　which　can　deliver　excellent　electrochemical　performance　(high　reversible　capacity　of　997　mA　h　g(-1)　with　ICE　of　71.6%　for　lithium　storage　and　639　mA　h　g(-1)　with　ICE　of　63.9%　for　sodium　storage　at　100　mA　g(-1)),　much　higher　than　those　of　sulfur-doped　or　bare　rGO.　According　to　the　physical　and　electrochemical　characterizations,　the　partial　substitutions　of　C-O　bonds　with　C-S　in　rGO　can　greatly　reduce　the　irreversible　consumption　of　lithium　or　sodium,　the　covalent-bonded　sulfur　dopants　and　the　doped　Sb2S3　nanoparticles　are　electrochemically　active　for　reversible　lithium　and　sodium　storage,　and　also　enhance　the　structure　stability　effectively,　resulting　in　superior　electrochemical　performance.