The invention relates to a DC fault ride-through control method for a hybrid modular multilevel converter. According to the control method of the invention, through controlling inputting and removing of half-bridge and full-bridge sub-modules in bridge legs, capacitance and voltage balancing of the half-bridge and full-bridge sub-modules in the bridge legs during a steady state period can be realized; and AC and DC current and voltage during a transient DC fault period can be effectively controlled. On the basis of the half-bridge and full-bridge sub-modules which operate effectively, through tracking capacitance and voltage of the half-bridge and full-bridge sub-modules in the same bridge leg and monitoring the DC-side fault state, input number instructions for the half-bridge and full-bridge sub-modules in the same bridge leg are allocated dynamically. Voltage balancing control on the half-bridge and full-bridge sub-modules in each bridge leg of the hybrid modular multilevel converter during the steady state period can be realized, effective control on the AC-side current during the DC dual-electrode fault period can be ensured, the converter can be ensured to operate continuously, and locking of the converter due to fault can be prevented.