Antenna system of PEPS system, key searching method, PEPS system and vehicle

The invention relates to the technical field of vehicles, and provides an antenna system of a PEPS system, a key searching method, the PEPS system and a vehicle. The antenna system comprises: a firstlow-frequency antenna arranged at a middle position inside a vehicle; a second low-frequency antenna and a third low-frequency antenna which are respectively arranged on a driving side and a co-driverside outside the vehicle; a fourth low-frequency antenna which is arranged at the position of a trunk in the vehicle, wherein the first low-frequency antenna, the second low-frequency antenna, the third low-frequency antenna and the fourth low-frequency antenna are configured to generate a field intensity carrier for searching a key, the relative positions of the first low-frequency antenna, thesecond low-frequency antenna, the third low-frequency antenna and the fourth low-frequency antenna are configured to enable the antenna system to generate field intensity carrier waves capable of covering the interior of the wh