The composition of volatile compounds in instant pickled mustard tuber and raw mustard tuber was analyzed by simultaneous distillation and solvent extraction coupled with gas chromatography-mass spectrometry(GC-MS).A total of 37 volatile compounds including 4 hydrocarbons,7 alcohols,2 ethers,5 aldehydes,4 acids,8 esters,1 phenol,5 sulphur comounds and 1 heterocycle were identified.Allyl isothiocyanate,benzyl isothiocyanate,cyclopropyl isothiocyanate,and dimethyl trisulfide were found in both materials.Allyl isothiocyanate(60.77%)and cyclopropyl isothiocyanate(6.10%)were the prominent compounds in raw mustard tuber,and those in instant pickled mustard tuber were p-propenylanisole(47.54%)and allyl isothiocyanate(11.41%).