The invention discloses a hairwork waste water cyclic utilization device and a treatment method thereof, which relate to the regenerating cyclic utilization of waste water. The device is provided with a screen well, a collector well, a water pump, an aeration adjusting tank, a hair filter, a coagulating tank, a flocculation tank, a primary settling tank, an electrolysis machine, a hydrolysis acidification tank, an anoxic tank, an aerobic tank, a nitrification tank, a secondary settling tank, a sludge tank, a sludge dewatering device, a filtering device and a desalter. The waste water can reach an industrial water standard through mutually matching all devices. The treatment method comprises the following steps: flocculating settling, electrolysis, anaerobic treatment, aerobic treatment, settling, filtering and desalting. Through the treatment method, regenerated water can reach the industrial water requirement of industrial production, the discharge of the waste water is reduced, the consumption of a chemical agent is low, the running cost is low, and the use ratio of the waste water is high.