“Precision agriculture” has put forward higher requirements for the hydraulic drive system of agricultural machinery,requiring it to have good linearity,high accuracy,and safety when walking.A buffering braking circuit was proposed.On this basis,synchronous control was carried out.The principle model of the agricultural machinery hydraulic drive system was established,and its working principle was analyzed,the control strategy was selected.The model was built in AMESim,and then the fuzzy adaptive PID model was built in MATLAB/ Simulink.Finally,the synchronization and robustness of the system were analyzed by co-simulation.The simulation results show that: when the system reaches the stable target speed after starting at 0.7 s,the maximum synchronization error is 12183 r/min,the maximum overshoot is 4% before reaching the stable target speed,and the synchronization error is 0.65 r/min after reaching the stable target speed； when the system load fluctuates,the system can achieve a stable target speed in 0.8 s,and the maximum synchronization error is 30.35 r/min； after reaching the stable target speed,the synchronization error is 0.65 r/min.Therefore,for the hydraulic drive system of agricultural machinery,using master-slave control and fuzzy adaptive PID control,fast response speed,slight overshoot,good robustness can be achieved；good straight-line driving performance,high accuracy,and safety of agricultural machinery can be ensured.