The invention relates to cooling systems of vehicles, in particular to a passenger car cooling system. According to the technical scheme, the passenger car cooling system comprises a water tank, an intercooler and draught fans, wherein the water tank is located on the side edge of the rear end of a passenger car; the intercooler and the water tank are arranged side by side in the length direction of the passenger car; the draught fans comprise the first draught fans and the second draught fans, the first draught fans are arranged for the water tank and used for cooling the water tank, and the second draught fans are arranged for the intercooler and used for cooling the intercooler; in addition, all the first draught fans and all the second draught fans are provided with independent drive devices. The passenger car cooling system is beneficial to reasonable layout and capable of effectively improving cooling efficiency.