Tin　dioxide　(SnO2)　and　graphene　are　unique　strategic　functional　materials　with　widespread　technological　applications,　particularly　in　the　areas　of　solar　batteries,　optoelectronic　devices,　and　solid-state　gas　sensors　owing　to　advances　in　optical　and　electronic　properties.　Versatile　strategies　for　microstructural　evolution　and　related　performance　of　SnO2　and　graphene　composites　are　of　fundamental　importance　in　the　development　of　electrode　materials.　Here　we　report　that　a　novel　composite,　SnO2　quantum　dots　(QDs)　supported　by　graphene　nanosheets　(GNSs),　has　been　prepared　successfully　by　a　simple　hydrothermal　method　and　electron-beam　irradiation　(EBI)　strategies.　Microstructure　analysis　indicates　that　the　EBI　technique　can　induce　the　exfoliation　of　GNSs　and　increase　their　interlayer　spacing,　resulting　in　the　increase　of　ENS　amorphization,　disorder,　and　defects　and　the　removal　of　partial　oxygen-containing　functional　groups　on　the　surface　of　GNSs.　The　investigation　of　SnO2　nanoparticles　supported　by　GNSs　(SnO2/GNSs)　reveals　that　the　GNSs　are　loaded　with　SnO2　QDs,　which　are　dispersed　uniformly　on　both　sides　of　GNSs.　Interestingly,　the　electrochemical　performance　of　SnO2/GNSs　indicates　that　SnO2　QDs　supported　by　a　210　kGy　irradiated　ENS　shows　excellent　cycle　response,　high　specific　capacity,　and　high　reversible　capacity.　This　novel　SnO2/GNS　composite　has　potential　practical　applications　in　SnO2　electrode　materials　during　Li+　insertion/extraction.