The present invention relates to rail switching device, and is especially one kind of rail switching device for electrically controlled switch. The rail switching device includes an electric controller and a driver to connect the electric controller to the rail. The electric controller has a power machine and a push rod connected to the power machine. The switch controlling process includes the steps of changing voltage, converting the rotating force into linear force with the motor, changing drive moment mechanically and pushing or pulling the switch rail with the driver, and has great drive moment and small operating current. The rail switching device has also built-in lead screw, small DC permanent motor, inside micro reducer and contact-less stroke switch, and possesses reduced size, raised reliability and capacity of realizing automatic control. |