Applied in modified QuEChERS（Quick,Easy,Cheap,Effective,Rugged and Safe） method with nano Bamboo Charcoal（NBC） as sorbents for analysis of multi pesticide residues in green tea was developed.Pesticides in tea were extracted with acetonitrile-H2O followed by liquid-liquid partitioning by adding NaCl.The extract was cleaned up using the mixture of NBC-PSA（primary secondary amine）-MgSO4 in dispersive solid-phase step.After separated on an Acquity UPLC TSS-3 C18 column（100 mm×2.1 μm,1.8 μm）,the analytes were determined by ultra high performance liquid chromatography-tandem mass spectrometry（UPLC-MS/MS） under multiple reaction monitoring mode（MRM）,and quantified by the external standard method.The recoveries for 10 pesticides in tea sample in the fortified concentration range of 0.02-0.50 mg/kg ranged from 72.3% to 116.3% with relative standard deviations（RSD） of 1.4%-13.9%.The limits of quantitation（LOQs） were in the range of 0.02-0.04 mg/kg.The method could meet the requirements for pesticide residue analysis.Furthermore,the method is more commercial than other QuEChERS methods with advantage of low cost of NBC．