Abstract: It firstly determined the vision navigation scheme of intermittent walking agricultural robot, and designed the computer image acquisition unit, computer mage processing module and the algorithm of vision navigation parameters extraction.It realized a vision navigation system of agricultural robot based on DSP and image processing.The experimental results showed thatthe navigation error will increase when the moving speed of agricultural robot increases. And the average lateral displacement of the robot is within 10 cm, which can meet the navigation requirements of agricultural robot.