A car rear throttle mounts on rear of the car,it works poor working conditions,Its waterproof, moisture-proof, shock-proof, dust-proof,reliable,longevous and other performance requirements can not meet the use requirements. Through research, a design scheme based on the Programming triaxial Hall element rear throttle is proposed. In view of the rear throttle performance requirements, chose the MELEXIS company’s MLX90316 dual output linear hall element,optimized the mechanical structure and anti-interference circuit of the rear throttle , calculated the data of spring. Made the rotating parts and sensor of the rear pedal independent of each other, no rotor connected to the rotating part in the sensor. The rear pedal’s various performance indicators meet the design requirements.