Abstract: The Phase-II Project of the Central Yunnan Water Diversion Project is a typical and rare complex pipe-canal combination system,in which the length of the pressure section accounts for about 69.7%. Automatic regulation is the key to ensuring the smooth deliveries of the whole diversion project. Taking the connecting section of Wuzhuang-village turnout as the study object,the one-dimensional unsteady flow numerical simulation platform of the pipe-canal combined system was developed based on the Preissmann Slot Method and Finite Difference Method. On the platform,the hydraulic response process of the study object under adverse scenarios was analyzed,and then the local flow controller`s parameters were optimized. The simulation results show that the control schemes of the pipeline pressure valve play a role of great significance and there is a high degree of nonlinearity and coupling. The shorter the valve control interval and the faster the valve speed,the more timely the system responds to the disturbance,and the better the comprehensive control performance,but the influence of the valve dead zone on the control effect is limited. After schemes comparison,it is recommended to adopt a pressure valve with a dead zone of 5 cm and a maximum opening and closing speed of 0.5 m/min. Moreover,the corresponding valve control frequency is set to 10 min/time. The research results and methods can provide references for the hydraulic automatic control of other connecting sections along the Phase-II Project of the Central Yunnan Water Diversion Project or other similar pipe-canal combined systems.