Engine cooling system and control method thereof

The invention relates to an engine cooling system and a control method thereof. An engine comprises a small circulation pipeline and a large circulation pipeline, and a heat dissipation water tank is arranged on the large circulation pipeline. The system is characterized by comprising an electromagnetic clutch water pump, an electronic thermostat, a driving grille, an electric control fan and a controller, wherein the electromagnetic clutch water pump is arranged on a converging pipeline of the small circulation pipeline and the large circulation pipeline; the electronic thermostat is arranged on the large circulation pipeline; the driving grille is arranged on one side, facing the vehicle advancing direction, of the engine; the electric control fan is arranged between the driving grille and the engine; and the controller is electrically connected with the electromagnetic clutch water pump, the electronic thermostat, the driving grille and the electric control fan. The system can respectively control the runn