It is verified that GB/T 20769-2008 is also suitable for the determination of the residue of sulfoxaflor in the samples of cantaloupe and eggplant and simplied the pretreatment steps. Samples of melon and eggplant were initially extracted with acetonitrile,salting out by Na Cl,cleaned up by aminopropyl( NH2) cartridge,eluted by methanol and dichloromethane( 5∶ 95,v∶ v),metered by methanol and water( 1 ∶ 1,v ∶ v). After filtered with a 0.2 μm membrane,the resulting samples determined by UPLC-MS/MS performing...