The invention discloses a white clay adsorption refining method used for waste lubricating oil regeneration, and belongs to the technical field of white clay refining. The white clay adsorption refining method used for waste lubricating oil regeneration comprises following steps: bought decolored white clay is introduced into a material cabin of an activation furnace, the activation furnace is turned on, heating temperature is controlled to be 300 to 550 DEG C for 2 to 4h of activation, wherein it is ensured that after activation, the water content of decolored white clay is reduced to be lower than 3%, in activation process, dry nitrogen is adopted for continuous purging, and nitrogen gas purging pressure is controlled to be 0.1 to 0.3MPa; after activation, an obtained material is introduced into a transfer material tank, and the transfer material tank is sealed for material cooling. According to the white clay adsorption refining method used for waste lubricating oil regeneration, nitrogen protection equipment heating is adopted to increase the effective absorption capacity of activated white clay, after activation, the white clay is protected with dry nitrogen gas, and is introduced into a lubricating oil refining equipment rapidly, so that oil refining and decoloring effect is improved, white clay using amount is reduced, output amount of secondary hazardous waste in process is reduced, and environment pollution is reduced further.