Engine cooling system comprising auxiliary water pump

The invention relates to an engine cooling system comprising an auxiliary water pump. The engine cooling system comprises a high-temperature circulating cooling system, a low-temperature circulating cooling system and a delay circulating system. The high-temperature circulating cooling system comprises a first expansion water tank, a high-temperature radiator, an engine cooling water sleeve, a first water pump, an electronic thermostat, an engine oil cooler, the auxiliary water pump and an air heater. The low-temperature circulating cooling system comprises a second expansion water tank, a low-temperature radiator, a second water pump, a turbocharger, an electronic supercharger, an intercooler and a BSG. According to the engine cooling system, the high-temperature circulating cooling system and the low-temperature circulating cooling system are arranged, and the high-temperature radiator and the low-temperature radiator are arranged separately, so that the requirements of different to-be-cooled parts for cooling temperature are effectively met, and the size of the engine cooling system is not increased through the technical scheme of the engine cooling system.