Novel stop valve

The utility model relates to a novel stop valve. The novel stop valve comprises an electromagnetic coil, a sealing device, a liquid inlet, an upper end cover, a valve element, a permanent magnet, a liquid outlet and a stop valve main body, wherein the stop valve main body consists of the liquid inlet and the liquid outlet; the liquid inlet and the liquid outlet are intersected to form a valve port; the spherical valve element capable of completely blocking the valve port is arranged at the valve port; the upper end cover is arranged above the stop valve main body; a semicircular groove allowing the valve element to be embedded therein is formed in the upper end cover; the electromagnetic coil is arranged above the upper end cover; the permanent magnet is arranged below the stop valve main body. The stop valve is low in invested cost, anti-corrosion and durable, reduces the maintenance frequency, reduces damage of hazardous article leakage to a human body, can quickly enable liquid to circulate and stop to increase the rate of equipment utilization, and is particularly suitable for application in part of dangerous chemical enterprises.