Waste mineral oil regeneration process and system

The invention belongs to the technical field of waste mineral oil regeneration, and particularly relates to a waste mineral oil regeneration process and system, which comprises the following steps of: settling, removing water and solid impurities deposited at the lower part, filtering, removing tiny solid particles and colloid, dehydrating, removing water in waste mineral oil, deoiling, controlling the temperature of a tower kettle of a light oil removal tower to be 200-220 DEG C, controlling the temperature of a tower top to be not more than 100 DEG C and controlling the temperature of a tower top to be not more than 100 DEG C; the system pressure is controlled to be-97 Kpa, light oil and fractions in the waste mineral oil are removed, the feeding temperature of a distillate oil tower is controlled to be 340-360 DEG C, the tower top temperature is controlled to be not greater than 140 DEG C, the system pressure is controlled to be-100 Kpa, distillate oil is extracted and recovered from a side line, distillat