The electric heater for soil repair comprises a metal pipe body, and the metal pipe body is sleeved with a magnesium oxide pipe, the heating wire is inserted through the magnesium oxide pipe, and the rear end portion of the metal pipe body is provided with a tapered metal head a front end portion of the metal pipe body is screwed with a ceramic end cap, the heating wire extends out of the ceramic end cap, and the heating wire is mounted with a terminal on a portion extending from the ceramic end cap, the front end of the magnesium oxide tube The distance from the ceramic end cap is 24 mm. The invention is provided with a conical metal head, which is convenient to be inserted into the ground and can be heated to a depth of 17 meters. The distance between the front end of the magnesium oxide tube and the ceramic end cover is 24 m, and the heat at the bottom of the heated soil can be raised. Heat to the soil above.