The invention discloses an automatic calibration method for a driving motor rack of a new energy automobile, which improves the rack calibration efficiency, enhances the calibration precision and reduces the labor intensity of a calibration engineer. According to the technical scheme, during matching of the rack of a driving motor of the new energy automobile, system resources of the rack are integrated; by automatic temperature returning control, automatic current setting and automatic data processing, motor control current can be automatically set, so that the precision of calibrating the motor rack is improved, and the motor rack calibration working efficiency is greatly improved. Particularly, the fluctuation of a magnetic chain of a rotor is reduced by controlling the temperature of the motor, a reading error is eliminated, and the precision of calibrating the motor control current is improved; therefore, an automatic procedure replaces frequent manual operation and visual inspection of the engineer, to realize continuous running and unattended operation, so that the working efficiency of motor rack calibration is greatly improved, and precious engineer resources are saved.