To establish a method of fingerprint analysis on Gong Chrysanthemum morifolium in Huangshan City by using GC-MS and computer aided similarity evaluation.The results showed that the optimum condition of GC-MS was applied with a fiber column(0.25mm×30m×0.25μm) coated with HP-5MS.The temperature at feed inlet was 260℃,the carrier gas was nitrogen,the flow rate was 1.0mL·min-1,the split ratio was 25:1,and the sample size was 2μL.The essential oil in ten batches of Gongju was analyzed by adopting temperature pro...