Abstract: Using Ni ring as anode and graphite as cathode,the deposit of Ni dendrite was manufactured.The influence of voltage,concentration of electrolyte and temperature on the appearance of the dendrite and fractal dimension was investigated.The results showed that the formation of dendrite gradually changed to open growth when the applied voltage was increased with checkered increase of fractal dimension.As the concentration of NiSO4 increased,the formation of dendrite had a trend from open growth to dense growth with increased change of the fractal dimension.When the temperature increased,the dendritic growth became relatively compact,and the fractal dimension increased gradually.