Liner for electric water heater

The utility model relates to an inner liner of a water heater, which comprises an inner liner body and an anti-rust layer, wherein, the anti-rust layer is a synthetic plastic layer which is formed by the rotational molding processing of synthetic plastics with high chemical stability; the inner surface of the whole inner liner is coated by the synthetic plastic layer and the synthetic plastic layer extends to an opening of the inner liner; a serging of the opening is covered to make the inner liner of a water heater have favorable anti-rust performance. The inner liner of a water heater is provided with an opening; a water inlet pipe, a water outlet pipe, an electric heating pipe and a sensing temperature probe are respectively inserted into the opening; the opening is provided with a V-shaped sealing ring used for sealing; a convex rib corresponding to the V-shaped sealing ring is arranged on a cover plate to make the inner liner have favorable sealing performance.