The invention relates to a coffee baking method, which comprises the following steps of: selecting a plurality of coffee beans, preheating the coffee beans in a bean baking bin, adding the coffee beans to heat the coffee beans to a temperature return point, continuously heating the coffee beans to enable the internal
moisture temperature to be at an
evaporation edge of 90-100 DEG C so as to soften
coffee bean fibers, and then baking the coffee beans according to the temperature
rise rate in the previous step. The method comprises the following steps: heating coffee beans at a temperature
rise rate of + / -1.5 DEG C / min until the
water content of the coffee beans is lower than 5%, controlling the temperature to be in a primary explosion state, carrying out a
dehydration reaction on
chlorogenic acid in the coffee beans, converting the
chlorogenic acid into
chlorogenic acid lactone, stopping baking before secondary explosion and before degradation of the chlorogenic acid
lactone, and taking out the coffee beans to complete baking. Therefore, the
water content of the coffee beans is reduced as much as possible,
quinic acid and
caffeic acid are prevented from being generated due to the fact that chlorogenic acid enters a
hydrolysis reaction, meanwhile, the baking degree is controlled to prevent chlorogenic acid
lactone from being degraded to generate a large number of compounds, and good-
flavor coffee created by the chlorogenic acid lactone is brewed.