The invention discloses a preparing method of lead dioxide porous electrode, which comprises the following steps: adding lead nitride and one or two electrochemical decorative ions in the plating liquid; making piece-shaped Ti electrode as anode and stainless steel piece-shaped electrode as cathode in the solution to plate; fetching black lead dioxide on the Ti electrode; grinding to obtain lead dioxide particle; blending lead dioxide, politef emulsion, Nafion liquid and distilled water through ultrasonic vibration; stirring until mud shape; pouring in the mould; proceeding hot pressing. |