Flower-like Sb2O3 (FL-Sb2O3 for short) for anode material in preudocapacitance was synthesized by solution method, and further treated by hydrothermal and calcination method. The effect of water bath temperature on the synthesis result was studied. The microstructure and morphology of apart Sb2O3 were investigated by X-ray, scanning electron microscopy techniques and electrochemical workstation. The research showed that water bath temperature had a great influence on the formation of material morphology. FL-Sb2O3 achieved the optimal morphology and structure at the water bath temperature of 30 ℃, with higher specific capacity and conductivity. FL-Sb2O3 exhibited a high specific capacitance of 580 F/g at current density of 0.5 A/g and an excellent rate capacity of 383 F/g at the current density of 5 A/g. An impressive capacitance retention of 91.6% was reached after 2000 cycles at the current density of 2 A/g.