Herein,　polyaniline　(PANI)/sulfonated　graphene　(SG)　hierarchical　composites　was　prepared　through　the　growth　of　polyaniline　nanorods　on　the　surface　of　SG.　The　morphology　and　structure　of　the　composites　were　analyzed　by　scanning　electron　microscopy,　fourier　transform　infrared　spectroscopy,　raman　spectroscopy,　X-ray　diffraction　and　X-ray　photoelectron　spectroscopy.　It　was　found　that　SG　was　beneficial　to　the　form　of　uniform　PANI　nanorods,　and　strong　interactions　could　be　formed　between　them.　Due　to　the　synergistic　effect　between　PANI　and　SG,　The　SG/PANI　composite　electrode　exhibited　excellent　electrochemical　performances,　especially　extraordinarily　high-rate　capability.　When　the　current　density　increased　to　50　A　g(-1),　SG/PANI　with　81.5%　PANI　presented　a　high　specific　capacitance　of　477.5　F　g(-1),　which　remained　86.3%　of　its　initial　value　at　0.5　A　g(-1).　The　cycle　life　test　show　the　composites　have　excellent　stability　(still　remain　96.7%)　after　2000　cycles.　Moreover,　an　asymmetric　supercapacitor　was　assembled　coupling　with　graphene,　which　demonstrated　remarkable　specific　energy　density　and　power　density　simultaneously.　The　highest　values　could　achieve　56.34　Wh　kg(-1)　and　1200　W　kg(-1).