Objective: To establish a HPLC-MS/MS method for simultaneous determination of five pesticides residues including tebuconazole,metalaxyl-M,thiophanate-methyl,oxytetracycline and abamectin in Anoectochilus roxburghii.Methods: The samples were extracted by acetonitrile solution and purified by QuEChERS method.Separation was performed on Agilent Eclipse Plus C18 column(50 mm×2.1 mm,1.8 μm) with the mobile phase consisting of 0.1% formic acid(A) and acetonitrile(B) by gradient elution(0-1.0 min,90% A;1.0-3.0 min,90%-70% A;3.0-5.0 min,70%-30% A;5.0-8.0 min,30%-10% A;8.0-14.0 min,10% A;14.0-15.0 min,10%-90% A;15.0-17.0 min,90% A).Detection was performed on a triple quadrupole tandem mass spectrometry with electrospray ionization source operating in positive ion mode under multiple reaction monitoring(MRM) mode.Results: The calibration curves of five pesticides showed good linearity coefficients(r>0.99).The average recoveries ranged from 72.7% to 94.9%(n=6),and the relative standard derivations(RSDs) were within 1.8%-10.3%(n=6).The detection limits of tebuconazole,metalaxyl-M,thiophanate-methyl,oxytetracycline and abamectin were 0.6,0.2,0.3,0.2,5.0 μg/kg,and the quantitation limits of 5 pesticides were 2.0,0.5,1.0,0.6 and 10.0 μg/kg respectively.Conclusion: The established method was proved to be sensitive,simple and reliable,and could be applied for the determination of these five pesticides in Anoectochilus roxburghii and quality control in the planting process.