The invention relates to the technical field of heating equipment, in particular to a water-storage-type electric hot water device. The water-storage-type electric hot water device comprises a shell,a liner, a insulating layer; the bottom of the shell is provided with a magnesium rod, a water outlet pipe, a water inlet pipe, a water segregator, a heating pipe, a temperature controller and a fireproofing controller; an outer coating comprises a first water-soluble organic composite coating agent layer and an epoxy back paint layer, and an internal coating comprises a second water-soluble organic composite coating agent layer, a polyester finishing coat layer and a protective film layer; and the heating pipe comprises a metal pipe, a protective layer, a resistance wire and magnesium oxide powders. The water-storage-type electric hot water device has the characteristics of simple structure, better anti-corrosion effect and higher heating efficiency.