The utility model relates to a portable electric soldering iron, including the electric drill body, be equipped with 12V DC power supply on the electric drill body, still include the guard shield, the guard shield setting is equipped with the electric iron in the guard shield on the electric drill body, and the electric iron passes through the wire with 12V DC power supply and links to each other, is connected with control switch on the wire, and control switch links to each other with the electric drill body, another maloperation when control switch can prevent that a circular telegram is used in electric drill body or the electric iron, the utility model discloses an advantage: this internal 12V DC power supply supplies power to the electric iron through the electric drill to through the switching on and break off of control switch control wires, can prevent when a circular telegram is used in electronics body or the electric iron another maloperation, improved the security performance, the welding of realization equipment wiring that can be quick can not only adapt to and operate under the circumstances of outdoor non -transformer, also can adapt to to operate under the indoor circumstances that has a power, and practicality is good.