Abstract:In order to study the changes of pesticide residues in garlic during the hot-air drying process，the way of QuEChERS combined with gas chromatography was used to track the change of chlorpyrifos，fenvalerate，and deltamethrin during drying process，to explore the effects of hot air drying conditions on pesticide residues in garlic.The results showed that hot-air drying could effectively reduce the pesticide residues in garlic，the removal rate of chlorpyrifos，fenvalerate and deltamethrin in garlic was higher after drying at 50 ℃ for 7.5 h，and the removal rate of chlorpyrifos reached 88% .The three pesticide residues of chlorpyrifos，fenvalerate，and deltamethrin all showed a trend of decreasing rapidly at first and then slowly becoming stable during the drying process.