Electromagnetic valve

The invention discloses an electromagnetic valve, a sealing plug (22) of which is movably clamped and connected in a central cavity (231) at the end part of core iron (23) and has a free stroke (L2) iThe invention discloses an electromagnetic valve, a sealing plug (22) of which is movably clamped and connected in a central cavity (231) at the end part of core iron (23) and has a free stroke (L2) in the moving direction of the core iron (23). The free stroke (L2) is less than the stroke (L1) of the core iron in the open or close process of the electromagnetic valve. The core iron and the sealinn the moving direction of the core iron (23). The free stroke (L2) is less than the stroke (L1) of the core iron in the open or close process of the electromagnetic valve. The core iron and the sealing plug of the electromagnetic valve are two mutually independent parts without interaction force, therefore the core iron has very small resistance in the process of starting movement and normal openg plug of the electromagn