System and method for pretreating LARVIN pesticide wastewater

The invention discloses a system and a method for pretreating LARVIN production wastewater. The system comprises a heating and air stripping tower (1), a heating Fenton kettle (2), and a neutralizingand flocculating kettle (3) which are sequentially connected by pipelines, wherein the heating and air stripping tower (1) is used for removing pyridine in LARVIN pesticide wastewater, so as to obtainthe pyridine-removed wastewater; the heating Fenton kettle (2) is used for removing the organic pollutants in the pyridine-removed wastewater. The method comprises the following steps of S1, heatingand air stripping; S2, Fenton oxidizing; S3, neutralizing and flocculating, so as to complete pretreatment. The system has the advantages that the removal rate of poisonous and harmful pollutants (pyridine and MHTA) and COD (chemical oxygen demand) is high, and the biochemical property of the wastewater is greatly improved. The method has the advantages that the investment is small, the running cost is low, the method is su