The invention relates to a double-circulating cooling
system comprising double expansion
water tanks. The double-circulating cooling
system comprises a high-temperature circulating cooling
system, a low-temperature circulating cooling system and a
delay circulating cooling system, wherein the high-temperature circulating cooling system comprises a first expansion water tank, a high-temperature radiator, an engine cooling
water jacket, a first water pump, an electronic
thermostat, an engine oil cooler, a
turbocharger and a heater; the low-temperature circulating cooling system comprises a second expansion water tank, a low-temperature radiator, a second water pump, an electronic
supercharger, an
intercooler and a BSG. According to the application, the two sets of circulating cooling systems are arranged, and the high-temperature radiator and the low-temperature radiator are arranged, so that the requirements of different components to be cooled for
cooling temperature are effectively met; in addition, through the adoption of the technical scheme provided by the application, the size of the cooling system is not increased.