The invention relates to a method for removing an oxygen-containing functional group of super-capacitor activated carbon, and belongs to the technical field of preparation of super-capacitor activatedcarbon, solving the technical problem of poor cycling stability caused by the high oxygen content of the super-capacitor activated carbon. According to a scheme, super-capacitor activated carbon is added into fluidized bed equipment which is preheated to 180-320 DEG C; nitrogen-hydrogen mixed gas in a certain proportion is fed; at the temperature of 180-320 DEG C, the activated carbon and hydrogen are subjected to a sufficient and uniform contact reaction for 10-30 min, and then material collection is conducted. The process method can effectively remove the oxygen-containing functional groupsof the activated carbon, has good economy and adaptability, and is suitable for industrial production.