An intelligent tracking car based on MK60N512 microcontroller was designed, its steering gear was four-bar linkage, the main controller collected the track image information using OV7620 camera and binary algorithm was used to process the collected image, and the guide line was figured out to guide the intelligent car. The main controller obtained the real time speed through photoelectric encode, PID control algorithm was adopted to adjust the motor speed to realize closed loop speed control. Finally intelligent tracking of the car is realized.