Abstract: The effects of reaction conditions on the flavoring function of the Maillard reaction products of glutamic acid and glucose were studied.The results showed that when the mixture of glutamic acid and glucose under their molar ratio of one to two reacted at 100℃ for 2hrs., the resulting Maillard reaction products had a better function for flavoring cigarette filler.By gas chromatography-mass spectrometry, it was proved that more volatile aroma components in the Maillard reaction products, particularly pyrazines, were produced by adding a small amount of acetaldehyde to the reaction system of glutamic acid and glucose.