DC power flow controller is a research hotspot in the field of DC power flow analysis and control, and it is generally installed on the DC bus at the hub converter station, which can effectively improve the power flow control degree of DC power grid. The DC power flow controller is added to the AC-DC hybrid system to establish the model in the DC grid. The network loss, static voltage stability index and voltage offset are optimized as the optimization targets, and the converter station and the DC power flow controller are coordinated according to the optimization results. The controller adjusts the power flow of AC-DC system step by step, realizing the coordination control of the converter station and DC power flow controller. Using the proposed coordinated control method, the system can be safely and stably shifted from one state to another. While improving the economic benefits of the system, it can also reduce the network loss and voltage offset and increase the static voltage stability margin. Using Matlab to optimize the power flow of the hybrid system and taking a five-terminal hybrid system as an example, the effectiveness of the proposed method is verified. This work is supported by National Natural Science Foundation of China (No. 51677023).