The invention belongs to the field of pesticide wastewater treatment and in particular discloses an oxyfluorfen production wastewater pretreatment method. Resorcinol and m-hydroxybenzoic acid are recovered from the oxyfluorfen production wastewater by a complexometric extraction technique. The method mainly comprises the following steps of: 1) performing complexometric extraction; and 2) performing liquid alkali reextraction. By the method, toxic pollutant is removed and reclamation is realized. The resorcinol and the m-hydroxybenzoic acid recovered from the wastewater can be directly applied to production procedures. By the pretreatment method, the removal rate of the resorcinol and the m-hydroxybenzoic acid in the wastewater reaches over 99 percent; chemical oxygen demand (COD) is reduced by over 80 percent; biochemical property is achieved. By the method, the problem that oxyfluorfen pesticide production wastewater cannot stably reach standard and is discharged can be effectively solved; and obvious environmental, economic and social benefits are achieved.