The hybrid High Voltage Direct Current (HVDC) transmission system that the rectifier adopts Line Commutated Converter (LCC) and the inverter adopts Modular Multilevel Converter (MMC), combines the advantages of LCC and MMC. And when the MMC is composed of fifty percent Half Bridge Sub-Modules (HBSMs) and fifty Percent Full Bridge Sub-Modules (FBSMs), the system has a strong capability to deal with AC and DC faults. In view of the problem that the HBSMs’ and FBSMs’ capacitor voltages can not be balanced under the serious rectifier AC fault, an improved circulation control strategy is proposed. It can adjust the reference value of the circulation component by detecting the running condition of MMC so that the arm current has positive and negative segments in each cycle. Then, a control strategy based on virtual resistance and current reference limitation is proposed to suppress the oscillation of the system and ensure the system to run safely and stably during the fault ride-through period. Finally, a LCC-MMC hybrid HVDC transmission system is built in PSCAD/EMTDC and the simulation results verify the effectiveness of the proposed method. This work is supported by National Key Research and Development Program of China (No. 2016YFB0900600) and National Natural Science Foundation of China (No. 51477061).