The invention relates to an electric soldering iron for welding. The electric soldering iron comprises an insulating handle, an electric soldering iron head, a conductive core column and an insulating core base. The electric soldering iron is characterized in that the conductive core column is arranged in the insulating core base, an electric heating wire is wound around one end of the insulating core base, the other end of the insulating core base is sleeved with a conductive connecting rod, one end of the electric heating wire is connected to the conductive core column, the other end of the electric heating wire is connected to the conductive connecting rod, the conductive connecting rod is installed on the insulating handle, the conductive connecting rod is electrically connected with the conductive core column through a wire and a temperature control circuit, the electric soldering iron head is connected with a heat conductive sleeve, the end, provided with the electric heating wire, of the insulating core base is sleeved with the heat conductive sleeve, the heat conductive sleeve is isolated from the electric heating wire through an insulating and heat conductive body, the insulating and heat conductive body makes contact with the electric heating wire and the heat conductive sleeve, and the electric soldering iron head is close to the end, provided with the electric heating wire, of the insulating core base. The electric soldering iron has the advantages of being rapid in heating, lower in power consumption, stable in temperature, long in service life and the like.