The invention relates to a motor and particularly relates to a mixed excitation automobile generator. The mixed excitation automobile generator comprises a rotor inlayed with magnet steel, stators, a rectifier bridge and a belt wheel. The rotor inlayed with the magnetic steel is fixed on a front housing and a rear housing of the generator through a rotation shaft; the stator sleeves the outer periphery of the rotor inlayed with the magnetic steel; the rectifier bridge is arranged on one side of the stator and each of the stator and the rectifier bridge is divided into two parts; each part of the stator comprises three phases of coils; each part of the rectifier bridge comprises at least three sets of rectifier tubes; a lead of each phase of the coils is connected to a set of rectifier tubes of the rectifier bridge; and the belt wheel is arranged on one end of the rotation shaft. The mixed excitation automobile generator improves output capability of the automobile generator rectifier bridge, reduces loss of the rectifier bridge, enables the output wave to be more stable, and greatly reduces interference on a storage battery and whole vehicle electric equipment. In the meantime, the mixed excitation automobile generator can perform real time control on output voltage and can guarantee stability of the output voltage.