Abstract: Combined with the structural characteristics of the shield hydraulic propulsion system,the shield hydraulic propulsion model is built on the multi-domain simulation platform Dymola.Considering the variability of loads during excavation,a dual-fuzzy-PID controller is designed and compared with the PID shield hydraulic propulsion control model.Based on the analysis results,with the parallel synchronous control and master-slave synchronous control strategies,the displacement and pressure tracking characteristics of the shield hydraulic propulsion system are compared and analyzed.The results show that in the start-up stage,the starting propulsion speed of the dual-fuzzy-PID control model is gentle and stable.When sudden load or speed changes occur,the hydraulic propulsion system under dual-fuzzy-PID control can keep stable control of propulsion speed and pressure.The speed and pressure fluctuations are far less than those of the PID control model,showing a better pressure and speed compound control ability.Through comparisons,the displacement tracking characteristics of the hydraulic propulsion system of the four-zone shield are as follows:when the maximum load changes suddenly,the displacement tracking deviation of the parallel synchronous control is 0.68 mm,and that of the master-slave synchronous control is 0.39 mm,42.6% lower than the previous result.In conclusion,the shield hydraulic propulsion system based on dual-fuzzy-PID control has better displacement tracking performance by adopting master-slave synchronous control strategy,which can improve the synchronous control accuracy of the propulsion system.