The invention relates to the technical field of oil-water separation and discloses a photoelectric induction type oil-water two-phase automatic separating device. The photoelectric induction type oil-water two-phase automatic separating device comprises a filter, an oil-water two-phase dropping zone, a first electromagnetic relay, a second electromagnetic relay, a third electromagnetic relay, a draining automatic control pump, a draining electromagnetic valve, an oil-water two-phase inlet electromagnetic valve, a fourth electromagnetic relay, a fourth photoelectric sensor, an oil-water two-phase distributor, an oil-water two-phase settlement separating zone, a first photoelectric sensor, a second photoelectric sensor, a third photoelectric sensor, a draining pipe, an oil draining pipe, anoil drain automatic control pump, an oil drain electromagnetic valve, a water collector, an oil collector, a hydrophobic and oleophylic coating and a controller. According to the photoelectric induction type oil-water two-phase automatic separating device, intelligent detection and automatic efficient control over the process are realized; by automatic efficient control of the device, manual efficiency is greatly improved.