An embodiment of the invention provides a hybrid direct-current transmission system and an electrode ESOF (emergency switch off sequence) control method thereof, relates to the technical field of electric power systems and aims to ensure stable operation of the system when the system transmits electrode ESOF commands. The method includes specific implementation steps executed by corresponding rectifier stations and inverter stations after corresponding protectors in the rectifier stations and the inverter stations transmit the electrode ESOF commands, stable operation of the system is ensured, and the method is applied to control of the hybrid direct-current transmission system.