The invention discloses a method for pretreating atrazine production wastewater. The method comprises the following steps of: 1) recovering ethylamine and isopropamide in wastewater through air rectification; and 2) recovering atrazine in the wastewater through acid separation. The pretreatment method is simple and practicable; and by the method, reclamation of the wastewater is realized. Ammonium salt recovered by a blowoff process can be directly applied to production; and the atrazine recovered by an acid separation process can be directly applied to processing atrazine wettable powder. The atrazine content of the wastewater pretreated by the method is less than 3 mg/L and reaches the workshop emission standard of national 'Heterocyclic Pesticide Industrial Water Pollutant Emission Standard'; over 75 percent of chemical oxygen demand (COD) is removed in the process; biochemical practicality is obviously improved; and subsequent biochemical load is reduced.