Abstract: The electrochemical behaviors of Mn(II)on metallic titanium electrode was studied with cyclic voltammetry under different conditions.Based on the characterization of electrolytic products by means of X-ray diffraction(XRD)and scanning electron microscope(SEM),the influences of temperature,potential and sulphuric acid concentration on ingredients,appearance and grain size of the products were analyzed.It was found that sulphuric acid concentration had stronger impact on the onset peak potential of oxide current than that of temperature during the electrodepositing of MnO₂.The crystal structure,morphology and granular diameter of prepared nano-MnO₂ were controllable by changing experiments parameters.