Abstract: A kind of a card insertion type membrane electrolysis device comprising an enclosed and hollow main body, an anode plate in the main body, at least one membrane plate installed in main body, and at least one cathode plate in the main body; the main body includes a tank with opening at the top and a removable top cover for covering the tank; inner wall of the tank has multiple insertion slots, wherein the anode plate is a removable card inserting into one of the insertion slot and between the cathode plate and the membrane plate at least one cathode chamber is formed; through the insertion card design for the anode plate and the membrane plate, the plates can be pulled out for inspection of wear off condition and maintenance, and the unnecessary replacement and wastage can be avoided.