NOVELTY - An electrolysis unit comprises unit electrolysis bathes connected in series pressurized by plate and frame filter press. The unit electrolysis bathes includes anode room and cathode room separated by anode ion membrane. The anode room and cathode room are provided with electrolyte inlet and electrolyte outlet connected with electrolyte store tank. The anode room is provided with anode, and cathode room is provided with metal or alloy electrode with cathode. The anode uses particle packed bed electrode having frame and stuff particle for stuffing frame with titanium or titanium with coat.    USE - Electrolysis unit for indirectly electrooxidation synthesizing organic electrolytic regenerative medium.    ADVANTAGE - The unit re-oxidizes low valence state medium produced in the indirectly electrooxidation synthesizing process through electrolyze having high valence state medium. It has big working current; convenient to open filter press, change membrane, and stuffing particle; and structure is compact and high space-time effect.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an electrolysis unit technique comprising:    (A) disposing electrolyte having low valence state indirect electrooxidation medium in anode electrolyte store tank, transmitting to anode electrolyte overhead tank through pump, and flowing electrolyte from each anode room electrolyte inlet of anode electrolyte overhead tank, while going through particle packed bed electrode;    (B) electrolyzing and oxidizing indirect electrooxidation medium, flowing oxidized electrolyte solution from each electrolysis bath anode room electrolyte outlet, going through anode gathering pipeline, flowing back to anode electrolyte store tank, and circulating electrolyte in whole anode reaction process through pump on external side of slot continuously;    (C) disposing the cathode electrolyte in cathode electrolyte store tank, transmitting cathode electrolyte overhead tank by pump, and flowing cathode electrolyte from each unit electrolysis bath cathode room electrolyte inlet of cathode electrolyte overhead tank, while going through cathode and hydrogen evolution;    (D) flowing reacted electrolyte solution from each electrolysis bath cathode room electrolyte outlet, going through cathode gathering pipeline, flowing back to the cathode electrolyte store tank, and circulating electrolyte in whole cathode reaction process through pump on the external side of the slot;and    (E) when thickness of high valence state medium ion reaches 80-95% of medium ion total thickness, stop electrolyzing, and obtaining regenerative medium solution with oxidation capability.