Motor braking control method and device, electric driving system and vehicle

The invention relates to the technical field of new energy vehicles, and discloses a motor braking control method and device, an electric drive system and a vehicle. And the quadrature-axis current and the direct-axis current of the motor are controlled according to the braking demand power of the vehicle, so that the motor recovers kinetic energy of the vehicle and converts the kinetic energy into heat energy. According to the technical scheme disclosed by the invention, the quadrature-axis current and the direct-axis current of the motor are controlled according to the braking demand power of the vehicle, so that the motor recycles the kinetic energy of the vehicle and converts the kinetic energy into the heat energy, and the kinetic energy recycling mode of the motor is no longer limited to electric energy converted and fed back to a power battery; therefore, the kinetic energy recovery mode of the motor is expanded, and the flexibility and diversity of vehicle kinetic energy recovery during motor braking are improved.