The invention relates to a technical process for treating kitchen waste and illegal cooking oil, which comprises the following steps: quick-freezing kitchen waste contained in a vessel, sterilizing at high temperature, and carrying out solid-liquid separation; preparing the solid into a feed; and carrying out separation and refinement on the liquid and remaining oil of pot rinsing water to obtain industrial oil. The operation process comprises the following steps: collection and loading, quick-freezing refrigeration, refrigerated transport, roller filling, high-temperature boiling, dry-wet separation, rolling drying, foreign matter sorting, particle pulverization, feed packaging, oil-water separation, water purification treatment and remaining oil treatment. The technical process for treating the kitchen waste and remaining oil of pot rinsing water obviously improves the environmental pollution, obviously reduces the waste of resources, obviously prevents the hazard of illegal cooking oil, and obviously increases the employment opportunity. Since the amounts of the kitchen waste and remaining oil of pot rinsing water are large, the quantity of labor force required by the industrial chain of the invention is very large.