The receiving-end hybrid multi-terminal HVDC transmission system has good engineering application prospects, but the coupling characteristics of the receiving-end when AC faults occur in different converter stations are complex, and the control strategy should be able to adapt to the AC fault ride-through requirements of each station. First, this paper studies the fault mechanisms of current imbalance, over-voltage and over-current when an AC fault occurs in the parallel modular multilevel converter (MMC) side of the inverter side of the receiver-side hybrid DC system, and the power return mechanism when an AC fault occurs in the LCC side of the receiver side. Then, based on the fault characteristics, a simple coordinated control strategy is proposed. That is, the current balance between parallel stations is realized by configuring voltage compensation based on active power imbalance in MMC slave stations; the serious overvoltage problem is solved by designing appropriate LCC constant current setting control. Finally, an electromagnetic transient simulation based on the actual parameters of the Baihetan-Jiangsu multi terminal HVDC transmission project verifies the correctness of the fault mechanism analysis and the effectiveness of the proposed control strategy. The coordinated control strategy can not only effectively solve the power and current imbalance problem of the MMC, reduce over-voltage and over-current and avoid power return, but also improve the recovery and security and stability of the system.