The invention relates to an electrified accompanying pipe heating type constant-temperature thermal insulation pipe for ships. The electrified accompanying pipe heating type constant-temperature thermal insulation pipe comprises a carrying pipe and a polyethylene pipe, wherein the carrying pipe coaxially penetrates into the polyethylene pipe; a foam layer is arranged between the carrying pipe andthe polyethylene pipe from inside to outside; a plurality of groups of coaxial bracket groups are further arranged between the carrying pipe and the polyethylene pipe; each coaxial bracket group is provided with three or more than three centering brackets; the three or more than three centering brackets are arranged around the circumference of the carrying pipe so that the carrying pipe and the polyethylene pipe are at a coaxial state; two ends of the carrying pipe are connected with flanges; each flange is provided with a thermal insulation flange cover; a flange end sleeve, which sleeves thefoam layer, sleeves between the inner end of each flange and the polyethylene pipe; the inner end of each flange end sleeve is in sleeve joint with the polyethylene pipe through a thermal shrinkablesleeve; the electrified accompanying pipe heating type constant-temperature thermal insulation pipe further comprises one or more than one red copper heating pipe which is arranged along the length direction of the carrying pipe; one red copper heating pipe penetrates into the foam layer and is fitted to an inner wall of the carrying pipe or two or more than two red copper heating pipes penetrateinto the foam layer and are uniformly distributed and fitted to the outer wall of the carrying pipe around the circumference of the carrying pipe; two ends of the red copper heating pipes are connected in a penetrating manner through protective sleeves and penetrate through the flange end sleeves.