Abstract: To improve the efficiency of detecting pesticide residues in tea,simultaneously determination of 8 pesticide residues in green tea was developed based on gas chromatography - mass spectrometry. The results show that,in an appropriate concentration range(Ametryn/0-100 ?g/L, Napropamide/ 0-10000 ?g/L,others/0-1000 ?g/L), the peak area and concentration of each residue was linear and each correlation coefficient was greater than 0.999,with the conditions of using acetonitrile as solvent, active carbon and PSA columns in series as the stationary phase, acetonitrile as eluent and with the elution volume at around 12mL.The recovery range of pesticides was 73.6%-116.8%,and the relative standard deviation range was 1.47%-15.58%.For its high sensitivity, selectivity, and strong anti-jamming capability, this method was suitable for the determination of 8residues in tea. And it provided test basis for the development of pesticide matrix reference materials in tea.