Objective:To establish a method for the determination of menthol and benzaldehyde in Milian Chuanbei Pipagao by GC with capillary column.Methods:A DB-1 quartz capillary column（0.32 mm×30 m×0.25 μm） was used.The temperature program was as following:the intial temperature of column was kept at 80℃ for 1 min

then raised to 180℃ at the rate of 10℃·min-1

finally to 250℃ at the rate of 25℃· min-1 and maintained the temperature for 5 min.The injection and detection temperature was 220℃ and 260℃.Splitless sampling was used and A FID detector was used.Result:The calibration curves of menthol was obtained with good linear relationship within the range of（3.18～31.8）μg·mL-1（r= 0.999 8）

the recoveries was 98.59%;The calibration curves of benzaldehyde was also obtained with a good linear relationship within the range of（5.25～52.52）μg·mL-1（r= 0.999 9）

the recoveries was 98.27%.Conclusions:This method is simple and accurate

and can be used to control the quality of menthol and benzaldehyde in Milian Chuanbei Pipagao.