The invention relates to the technical field of a current generator, in particular to an integrated structure of a rectifier bridge rear cover, comprising a motor rear end cover, a rectifier bridge assembly connected with the motor rear end cover, wherein the rectifier bridge assembly comprises a six-phase rectifier bridge, and the six-phase rectifier bridge comprises six first diodes pressed on the end cover. The six-phase rectifying bridge adopts the structure of integrating with the back end cover of the motor, the first diode is press-fitted into the back end cover of the motor, and the second diode is press-fitted into the heat dissipation plate, so that the heat dissipation area of the diode is large, the heat dissipation performance is better, the service life of the diode is prolonged, and the rectifier plate of the first diode is removed, the axial size of the alternator can be reduced, and the volume of the alternator is smaller; At the same time, an avalanche diode is adoptfor the diode, which can be quickly recovered aft breakdown within a certain voltage range, and can absorb reverse high-voltage pulses in the circuit, thereby protecting the electrical system such asthe ECU and the electric appliance from high-voltage damage.