The utility model discloses an electric demister for gas cleaning, include the casing and locate the inside anode plate of casing is arranged and cathode tube row, along the flow direction of flue gas, the anode plate arrange with cathode tube arranges all slope settings. Consequently, when the flue gas got into in the casing, its area of contact with the anode plate is arranged and cathode tube arranges was great, was guaranteeing that this electric demister has when higher gas cleaning rates, required anode plate arrange with row's number of cathode tube row still less to make this electric demister's structure compacter, occupation space is littleer, and then improves the flexibility of its installation. The utility model discloses a mainly be applied to wet desulphurization tower top gas cleaning process, through reasonable lectotype, the flue gas dust removal defogging process behind the wet flue gas desulfurization is independently accomplished to the former mechanical defogging device of fungible wet flue gas desulfurization.