The invention belongs to the technical field of petroleum energy resources, and particularly relates to a method for regenerating waste rolling oil.The method comprises the following steps that firstly, the waste rolling oil is pretreated, a polyacrylamide solution, an alkali solution and a poly(diallyldimethylammonium chloride) solution are sequentially added into the waste rolling oil, stirring under heating and centrifugal separating are sequentially performed, and supernatant oil liquid is obtained; meanwhile, silica gel is modified through high-temperature roasting and a method of doping metal elements; lastly, column chromatography is performed on the supernatant oil liquid through the modified silica gel, wherein the supernatant oil liquid is poured into an assembled chromatographic column, the oil acceleratedly passes through the chromatographic column through a vacuum pump, and then regenerated base oil is obtained.The method has the advantages of being easy to operate, low in energy consumption, free of pollution, clean, environmentally friendly, high in recovery rate and the like, and secondary pollution caused by a traditional process technology is thoroughly abandoned; by adopting the method to treat the waste rolling oil, the physical and chemical properties and the using property of the waste oil can be effectively recovered, and the good social benefit and economic benefit are achieved.