Electromagnetic valve

The invention provides an electromagnetic valve which comprises a valve body, a hollow wire rack, a winding, a stator, a rotor, a magnetic loop mechanism and an elastic resetting element. The valve body is provided with a first passage and a second passage, the hollow wire rack is connected to the valve body, the winding is wound on the wire rack, the stator is mounted at one end of a wire rack through hole and provided with a third passage, the rotor is movably mounted at the other end of the wire rack through hole and provided with a through hole inside, a pair of pistons are mounted at two ends of the through hole in the rotor respectively, connecting holes connecting the through hole in the rotor with the wire rack through hole are formed in the two ends of the rotor respectively, and the magnetic loop mechanism is fixed to the stator and the wire rack. When the winding is powered on, the rotor is attracted to the side of the stator to enable one of the pistons to close the third passage of the stator, and the first passage and the second passage of the valve body are communicated through the through hole in the wire rack; when the winding is powered off, the rotor moves to the side away from the stator under action of the elastic resetting element to enable the other piston to close the first passage of the valve body, and the second passage of the valve body and the third passage of the stator are communicated through the through hole in the rotor, the connecting holes and the through hole in the wire rack.