Closed electrochemical reaction device

The invention discloses a closed electrochemical reaction device. The device comprises: a body, wherein multiple desorption plates arranged in the body, and a channel formed between every two adjacentdesorption plates of all the desorption plates; a plurality of anode terminals and cathode terminals are led out from one end of the desorption plates, the bottom of the body is provided with a waterinlet and a backwashing water outlet, and the top of the body is provided with a water outlet, a backwashing water inlet and a gas discharge port; and a control cabinet located at one side, providedwith the anode terminals and the cathode terminals, of the body, wherein the control cabinet comprises a direct current power supply, and the anode and the cathode of the direct current power supply are electrically connected with the anode terminals and the cathode terminals through copper rows respectively. The closed electrochemical reaction device of the embodiment of the invention can avoid electrode surface fouling, a