The Ni2CoS4 was prepared by hydrothermal method and further integrated with reduced graphene oxide (GO) and hydrothermal holey graphene oxide (HHGO) by a facile physical approach and hydrothermal reaction to obtain Ni2CoS4/RGO/HRGO composite electrode material. The morphology and structure as well as electrochemical properties of the prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy tests. The results showed that the specific capacitance of supercapacitor cathode material was 1 684 F/g at 1 A/g, and remained 91.8% after 2 000 cycles at 5 A/g. The superior electrochemical behavior of Ni2CoS4/RGO/HRGO could be attributed to the improved wettability of the electrolyte to the electrode material and the increased ion and charge transport rate. At the same time, the agglomeration of graphene and Ni2CoS4 and the volume change in the cycling process were alleviated as well. Therefore, Ni2CoS4/RGO/HRGO is a promising electrode material with application prospect for high performance supercapacitors.