The process of treating wastewater from coix seed oil production was introduced in this article.In this process, industrial sodium chloride salt was used to break the emulsion.With air floatation and biochem. treatment, the wastewater reached the requirement for first level discharge water.Compared with acidification process which is commonly used in treating wastewater from vegetable oil production, the process mentioned herein is simpler in operation, higher in efficiency, and lower in cost, which may be referenced in the treatment of other wastewaters from vegetable oil production