Transition-metal　dichalcogenides　with　a　lamellar　structure　have　been　recognized　as　a　class　of　attractive　host　materials　for　Na+　insertion,　and　intensively　investigated　as　anodes　for　sodium-ion　batteries.　However,　large-scale　applications　are　severely　restricted　by　their　intrinsic　inferior　conductivity　and　large　volume　expansion　during　deep　cycles.　Herein,　a　unique　0D/2D　heterostructure　of　SnS2　quantum　dots　(QDs)　with　N-doped　Ti3C2Tx　MXene　(namely,　SnS2　QDs/Ti3C2)　has　been　successfully　designed　via　an　ingenious　solvent　spatial　confinement　growth　strategy.　During　the　hydrothermal　process,　the　nucleation　and　growth　of　SnS2　nanoparticles　can　be　effectively　regulated　by　N-methyl　pyrrolidone,　which　results　in　the　uniform　growth　of　SnS2　QDs　of　about　3　nm　onto　the　Ti3C2Tx　MXene　matrix.　Meanwhile,　in　situ　N-doping　of　Ti3C2Tx　MXene　can　also　be　realized　because　of　the　NH3　released　from　the　decomposition　of　the　sulfur　precursor,　which　greatly　enhances　the　interfacial　Na+　transport.　Such　a　rational　design　endows　the　newly　developed　SnS2　QDs/Ti3C2　electrode　with　fascinating　sodium　storage　properties　including　a　high　specific　capacity　of　763.2　mA　h　g(-1)　at　100　mA　g(-1)　and　ultrastable　cycling　stability　(345.3　mA　h　g(-1)　at　100　mA　g(-1)　after　600　cycles).　The　experimental　and　theoretical　simulation　results　demonstrate　that　the　ultrafine　SnS2　QDs　with　abundantly　active　sites　on　the　interface　and　stronger　Na+　adsorption　energy　on　the　heterojunction　formed　between　N-doped　Ti3C2　MXenes　contribute　to　the　superior　sodium　storage　capability.