The invention relates to a method for treating waste water from the food industry, which includes the steps of: A. Waste water flows through aplurality of grilles and is flocculated and added with air via blowing, and then is settled; B. First waste water is sterilized with ultraviolet, whose pH is adjusted to 5.5-7.5 with base; C. Waste water flows into an anaerobic aeration tank and an aerobic tank, and next is treated by the oxygen film bioreactor, and then is filtered by an activated carbon filter and by a ultrafiltration membrane filter, finally is settled; D. Waste water is filtered firstly by a cartridge filter, and then by a microfiltration membrane filtration process, filtering by a ultrafiltration membrane filter, and finally by a reverse osmosis membrane filter, to obtain the discharge water in accordance with the environmental standard. Compared with the prior art, the method for treating waste water from the food industry is a simple, convenient and fast method for neutralizing waste water from the food industry, as well as a method for removing suspended solids, metal oxides, colloids, organic matters, nitrogen source materials and bacteria, etc., which not only can be used for economically, efficiently treating a large amount of waste water, with simple operation procedures, low operating costs, and smaller covering area, but also have remarkable treatment effects.