In this study, the change rules of the main flavoring components in fermented grains during the fermentation of Hengshui Laobaigan liquor in different seasons were studied. GC was applied for tracing monitoring of the main flavoring components including ethyl acetate, ethyl lactate, ethanol, acetaldehyde, 1-propanol, isopentyl and isobutanol. The research results suggested that, ethyl acetate content increased with the extension of the fermentation in all four seasons and slightly reduced in late fermenting...