Cooling system for vehicle

The utility model provides a cooling system for a vehicle, which belongs to the field of vehicle cooling systems and comprises a cooling circulation loop, and a roof to-be-cooled device, a rear cabin to-be-cooled device and a roof temperature control device which pass through the cooling circulation loop. The high-position expansion water tank is located on a car roof, the low-position expansion water tank is located on a rear cabin, the low-position filling device is arranged on the cooling liquid filling loop, one end of the high-position expansion water tank is communicated with the cooling circulation loop, and the other end of the high-position expansion water tank is connected with the low-position expansion water tank through an exhaust pipe. And the low-position expansion water tank is communicated with the cooling circulation loop through a pipeline via a low-position filler. The low-position expansion water tank and the low-position filling device are externally connected to the cooling circulation