A facile one-step hydrothermal process was used to prepare MoS2/CoS2 binary composites with different raw material ratio as electrode material for supercapacitors. Results of electrochemical performances show that MoS2/CoS2 binary composites exhibit competitive specific capacitance (549 F/g at 2 mV/s or 434 F/g at 1 A/g) and excellent cycling stability as the molar ratio of Mo: Co=2:1 in raw material. And microstructure and morphology analyses reveal that the MoS2/CoS2 binary composites were composed of octahedron-shaped CoS2 and flower-liked MoS2. Above all, due to the coupling two species, large surface areas and tunable compositions, the obtained MoS2/CoS2 binary composites electrodes possess the best electrochemical properties.