Abstract: According to the speed and accuracy of motor grader operation when the travel delay problem and control parameters, the optimization of speed control system of grader walking tuning fuzzy PID algorithm was put forward based on parameter coordination problem solving speed lag, and the application of the algorithm was completed in the control system of grader. The system uses a single-chip microcomputer as the control center of walking speed, in order to verify the validity of the parameter self tuning fuzzy PID algorithm and reliability of grader speed control for a set of interference signal test, the simulations were given by Simulink Matlab software, the control effect of speed stability of the conventional control, PID control, PID parameter self-tuning fuzzy PID control were analyzed and the test results showed that the response time is short, fast response speed, can meet the design requirements.