Method for detecting pesticide residues in food

The invention relates to the field of food detection, and particularly discloses a method for detecting pesticide residues in food. The method for detecting pesticide residues in food comprises the following steps of: S1. pretreating a food sample: S1.1. preparation of a food sample solution: preparing the to-be-detected food into a sample solution; S1.2. food sample extraction: extracting the sample solution by using a magnetic adsorbent; S2. taking the supernatant obtained by extraction in the step S1.2, and determining the supernatant by using a liquid chromatography-tandem mass spectrometry method; the magnetic adsorbent is prepared by modifying Fe3O4@TpBD nanoparticles with a core-shell structure by using tetrabutyl titanate, and the Fe3O4@TpBD nanoparticles with the core-shell structure are prepared by wrapping Fe3O4 particles with 1, 3, 5-triformyl phloroglucinol and biphenyl diamine. The detection method provided by the invention has the effect of simplifying the detection pretreatment process of the