The invention provides a low-pressure exhaust gas recirculation (EGR) system of a vehicle engine and relates to an EGR system. The low-pressure EGR system of the vehicle engine passes through the engine, wherein a gas inlet and a gas outlet are formed in the engine, and the system comprises a gas inlet pipeline, a gas outlet pipeline, an EGR pipeline and an electronic supercharger. The gas inlet pipeline is arranged in front of the gas inlet and used for gas inflowing of the engine. The gas outlet pipeline is arranged behind the gas outlet and used for exhaust gas discharging of the engine. The EGR pipeline is connected between the gas inlet pipeline and the gas outlet pipeline. The electronic supercharger is arranged on one side of the gas inlet pipeline through a pipeline. According to the low-pressure EGR system of the vehicle engine, the electronic supercharger is additionally arranged on a gas inlet system, and response characteristics of the engine are improved under the working conditions such as cold starting, rapid accelerating, a low rotating speed and a low load accordingly. After the electronic supercharger is applied to the engine, natural aspirated working conditions, such as cold starting, the low rotating speed and the low load, of the engine are made up, the gas inlet speed of the engine is increased, and the response speed is reduced.