The invention relates to a method for recycling sodium chloride from waste water generated during production of phenoxyacetic acid pesticide. The method for recycling the sodium chloride from the waste water generated during production of the phenoxyacetic acid pesticide comprises the following steps: concentrating the waste water produced during production of the phenoxyacetic acid pesticide under the reduced pressure heating condition, thus obtaining concentrate containing sodium chloride solids and having a certain solid solution ratio; centrifuging or filtering to obtain sodium chloride solids, mixing sodium chloride solids obtained through many times of concentrating, centrifuging or filtering, washing with diluted alkaline solution, and drying, thus obtaining refined low-COD (less than 100ppm) industrial recycled sodium chloride, wherein the content of sodium chloride is 90-99.9%. Compared with the prior art, the method for recycling the sodium chloride from the waste water during production of the phenoxyacetic acid pesticide has the advantages that salt obtained by treating the waste water with diluted alkaline solution is washed to remove residual organic acid and inorganic acid out of the salt and sodium chloride in 2,4-D or 2-methyl-4-chloro high-salinity wastewater is recycled and refined.