Novel electromagnetic variable-flow water pump

The novel electromagnetic variable-flow water pump comprises an outer shell, a water pump waterproof sealing piece and a temperature sensor, the outer shell is connected with a water pump bearing, the water pump bearing comprises a water pump bearing outer ring and a water pump bearing mandrel, and meanwhile the outer side of the water pump bearing mandrel is sleeved with a driving wheel; the periphery of the water pump bearing mandrel is sleeved with a water pump impeller fixing ring, and a guide rail is arranged on the water pump impeller fixing ring. According to the novel electromagnetic variable-flow water pump, when the water temperature of an engine is high, the gap between the water pump impeller and the volute is small, and the water flow is large. When the water temperature of the engine is reduced to a lower value, the electromagnetic coil is electrified to generate magnetic force, the magnetic force attracts the impeller movable ring to move, a gap between the impeller movable ring and the volute