The invention discloses a distillation separation method for oily wastewater, which comprises the steps of vacuum evaporation, distillation treatment and condensation treatment, and pollutant concentration and pollutant discharge, wherein the vacuum evaporation is used for evaporating industrial wastewater in vacuum, and moisture in the wastewater is gasified into gas; the distillation treatment and the condensation treatment are used for distillating and separating the evaporated gas after being liquefied, and the separated water is distillated to obtain 90-95% of water through concentration and then is industrially recycled; the pollutants left after wastewater evaporation are concentrated so as to concentrate out 5-10% of waste; and the concentrated pollutants are discharged. Breakthrough zero liquid discharge and zero pollution are realized; and the treatment cost is reduced, and a clean water treatment process is used for producing clean water. According to the method disclosed by the invention, sewage discharge and recording in government departments are not needed, evaporation and concentration are carried out at a low temperature in a vacuum state, and the environmental design is safe, so that 24-hour fully automatic operation and an automatic cleaning function are realized.