On 4% FFAP+1% H\-3PO\-4 Chromosorb W/AW DMCS (80mesh 100mesh) column, the optimized separation of methyl 2 methyl 3 furyl disulfide flavour was obtained By using automatic preparative attachment model App 5 to GC 9A, the content of methyl 2 methyl 3 furyl disulfide flavour was raised from about 77% to 99 5% The product was identified by IR, MS and \+1 HNMR