The　NiS2/reduced　graphene　oxide(3D　rGO)　composite　with　the　3D　porous　structure　was　successfully　synthesized　via　a　facile　one-step　solvothermal　method　using　a　suitable　soft　template.　The　surface　morphology,　valence　of　the　elements　and　electrochemical　performance　of　the　samples　were　characterized　by　FESEM,　TEM,　XPS　and　the　electrochemical　workstation.　The　results　show　that　the　NiS2/3D　rGO　composite　has　a　three-dimensional　stacked　pore　structure　of　graphene　and　high　specific　surface　areas.　The　specific　surface　area　is　57.51　m2•g-1.　Electrochemical　measurements　show　that　the　NiS2/3D　rGO　microsphere　electrode　reveals　amazing　pseudocapacitive　properties　with　high　specific　capacitance　(1　116.7　F•g-1　at　current　density　of　1　A•g-1)　and　a　favorable　rate　capability　(74.5%　from　1　to　5　A•g-1),　Moreover,　the　specific　capacitance　remains　91.2%　of　its　initial　value　after　1　000　cycles　at　current　density　of　4　A•g-1.　Therefore,　NiS2/3D　rGO　composite　can　be　used　as　a　promising　electrode　material　for　the　supercapacitor.　©　2020,　Editorial　Office　of　Acta　Materiae　Compositae　Sinica.　All　right　reserved.