The invention discloses a dual-Hall sensor motor, which comprises a motor (1), a magnetic ring (2) and Hall elements (3). The invention adopts the technical proposal that a rotor shaft of the motor is provided with an annular permanent magnetic ring of which half ring is an N pole and the other half ring is an S pole; two Hall elements which mutually form a central angle of 90 degrees are arranged in the circumference direction close to the magnetic ring; and when the magnetic ring rotates along with the rotor shaft of the motor, the revolution direction and the revolution number of a motor rotor are acquired by acquiring, identifying, counting and recording high-low level of square wave, rising edge and falling edge output by the two Hall elements. The provided dual-Hall sensor motor with the functions of outputting square wave signals of the revolution direction and the revolution number is applied to the adjustment of an automobile chair position to make the automobile chair position adjust the measurement of the revolution direction and the revolution number of the motor and achieve the aims of definite revolution direction, accurate counting and long operation life.