Abstract: In view of the function of unmanned harvester to harvest crops independently and cooperate with unmanned tractor to transport grain, considering the different functions of each node control unit equipped with unmanned harvester on driving control, the control function of each node control unit was defined and the priority of control execution was determined.In Simulink, driving control strategy is formulated according to different working conditions, and reasonable driving speed and direction are selected.According to the transmission structure of the unmanned harvester, the driving speed of the unmanned harvester was controlled by the prediction algorithm and PID control.The experimental results show that this method meets the driving control needs of the unmanned harvester in the cooperative operations.