The invention discloses a vehicle start generator and belongs to the technical field of vehicle motors and electrical appliances. The vehicle start generator is formed by a shaft, a rotor, a stator core, armature windings, permanent magnets and a bearing; 2K rectangular holes are evenly distributed in the circumferential surface of the rotor, and K is a positive integer; the stator core is formedby 3K evenly-distributed 'U'-shaped sub-stator cores, and two ends of each sub-stator core are respectively provided with a stator tooth provided with fan-shaped sides; one permanent magnet is clampedin the yoke of the center of each sub-stator core, and the root of each stator tooth is surrounded with one armature winding. The vehicle start generator has the advantages of short magnetic circuit,short enameled wire and quite low in consumption of iron and copper, the advantage that the rotor is magnetic conductive is fully developed, and high application values on the vehicle start generatorare achieved.