Electrochemical device for treating heavy metal wastewater

The invention relates to an electrochemical device for treating heavy metal wastewater, which comprises an electrochemical box body, the electrochemical box body is internally provided with a perforated aerator pipe, a polar plate support frame, a pulse water distribution pipe, polar plates and polar plate clamping pieces, and the front and rear inner walls of the electrochemical box body are respectively and correspondingly provided with two polar plate clamping pieces which are arranged up and down; a plurality of uniformly distributed clamping grooves are formed in the inner side surfaces of the polar plate clamping pieces, the clamping grooves of the polar plate clamping pieces on the front and rear inner walls are correspondingly arranged and are used for clamping polar plates, the four corresponding clamping grooves in the front, rear, upper and lower parts are respectively used for fixing the upper and lower parts of the two side edges of the polar plates, and a polar plate support frame is arranged be