The invention discloses a multifunctional electric soldering iron comprising an electric soldering head, an electric heating pipe connected with the electric soldering head, an electricity storage set connected with the electric heating pipe, an adaptor connected with the electricity storage set, a guide line connected with the adaptor, and an electric plug connected with the guide line, wherein the electric soldering head is connected with the electric heating pipe through a threaded interface; a handle is arranged outside the electric heating pipe, the electricity storage set and the adaptor; a catch is arranged at one end of the handle; finger grooves are formed in the position, close to the catch, of the handle; a jaw groove is formed in the other end of the handle. The multifunctional electric soldering iron is simple in structure and reasonable in design; as the threaded interface is arranged, a proper electric soldering head can be selected and replace the prior electric soldering head, working efficiency is improved, and the electric soldering iron can be used under the complex working environment due to the electricity storage set; as the finger grooves and the jaw groove are formed, operation workers can use the electric soldering iron comfortably, and the electric soldering iron is applicable to being widely popularized and used.