Abstract: Boron-doped diamond thin film electrodes were prepared on a P-type single crystal substrate by hot filament chemical vapor deposition.The effects of acetone flow rate on the surface morphology of boron-doped diamond film electrodes were analyzed by scanning electron microscopy and X-ray diffraction.Cyclic voltammetry was used to analyze the electrochemical characteristics of boron-doped diamond film electrodes in different concentrations of acid-base electrolyte.The results show that the quality of boron doped diamond film increases first and then decreases with the increase of acetone flow rate.And boron-doped diamond film electrodes have different electrochemical windows in different electrolytes.The widest electrochemical window in neutral solution is above 3.2 V,and it has extremely strong electrochemical oxidation performance.