The utility model relates to a motor position sensor zero automatic learning system comprising a position sensor. The stator of the position sensor and the stator of a driving motor are fixed on a shell of a hybrid power module. The rotor of the position sensor and the rotor of the driving motor are fixed on a rotor bracket. The rotor bracket is mounted on a motor shaft of the driving motor. U, V and W phase lines of a motor controller are respectively and correspondingly connected with U, V and W phase lines of the driving motor. The position signal input end of the motor controller is connected with the position signal output end of the position sensor. According to the utility model, after the motor and the motor controller are loaded, the initial position of the position sensor is automatically measured, and the digital quantity of the initial position is saved to a data storage chip, which improves the accuracy and reliability of zero detection by the motor position sensor and saves the zero adjustment time of the position sensor.