The invention provides a double electromagnet comprising a shell, an iron core, two induction coils and a shared iron core. The induction coils wound on a coil frame and the iron core are arranged in the shell; the two induction coils are respectively arranged above and below the iron core, and the shared iron core is arranged in the induction coils. The invention provides a high-speed double electromagnet aiming at the defects existed in the application of a traditional electromagnet in an electronic control system and utilizes one electromagnet to simultaneously control a plurality of objects and realize a plurality of control functions, thereby reducing the number of electromagnets in the electronic control system and saving the space of the electronic control system. The high-speed double electromagnet can be used in electronic control systems of various diesel engines.