Fully-integrated system and application of electric automobile

The invention discloses a fully-integrated system of an electric automobile. The fully-integrated system comprises a motor, a reduction gearbox and an integrated controller. The integrated controlleris provided with a whole vehicle control module, a motor control module, a high-voltage power distribution module, a voltage conversion DCDC module and a vehicle-mounted charging module. The whole vehicle control module is connected with the motor control module, the voltage conversion module, the vehicle-mounted charging module and the motor through an electromagnetic shielding wire harness arranged in the integrated controller. The high-voltage power distribution module is connected with the motor control module, the voltage conversion module, the vehicle-mounted charging module and the motor through copper bars arranged in the integrated controller. According to the invention, when a whole vehicle is loaded, only an accelerator pedal and a brake pedal need to be connected, connection between high-voltage parts