The utility model discloses a multi -functional elecyrical heat exchanger, including container casing and terminal box, U type heat exchange tube is installed to the internal one end of vessel shell, and U type electrothermal tube is installed to the other end, all be equipped with a plurality of baffling board on U type heat exchange tube and the U type electrothermal tube, be equipped with the baffle between U type heat exchange tube and the U type electrothermal tube, flange A fixedly connected with pipe case is passed through to one side of container casing, U type heat exchange tube passes flange A's terminal surface dip nozzle incasement, the other end of container casing sets up flange B, and U type electrothermal tube passes connects the terminal box behind flange B's the terminal surface, the side of container casing is equipped with three shell side interface, both sides all are equipped with the tube side interface about the pipe case. The utility model discloses simple structure, reasonable in design has reduced the volume of equipment greatly, has reduced manufacturing cost, job stabilization, the good reliability has improved work efficiency, has reduced and has maintained and use cost.