The invention discloses an engine cooling system for a passenger car. The system comprises a fan, a cowl, a water-cooling radiator, a boosting intercooler, a fan belt pulley, a bent axle belt pulley and a belt, wherein the bent axle belt pulley drives the fan belt pulley to act by the belt; the fan belt pulley drives the fan to rotate by the belt to cool the water-cooling radiator and the boosting intercooler; and the cowl is covered on the fan. The engine cooling system is characterized in that the fan is an axial flow fan, and the transmission ratio of the bent axle belt pulley to the fan belt pulley is 1.25. In the engine cooling system, the traditional arrangement mode is changed, and the engine cooling system has simple structure and is convenient to install and maintain. The original system is replaced without big change. Longer service life can be provided, cooling performance and highest efficiency are improved, and the engine cooling system can work more silently. The engine and the fan parts are slightly abraded and have higher durability.