The present invention provides a kind of method for manufacturing freeze-drying ground coffee comprising: providing one kind has 40wt% coffee extracts from solid to 55wt% Gas is added to the amount of coffee-extract from 1nl/kilogram 5nl/kilogram coffee-extract, in order to provide gassiness coffee extract more than atmospheric pressure Air pressure gassiness coffee extract is reduced to the coffee-extract for forming foaming Coffee-extract of foaming is cool below -40 °C without shearing, or under shearing, in order to form coffee-extract freezing, is crushed to powder Coffee-extract freezes and the dry powder step, wherein being cool below coffee-extract of the cooling foaming of coffee-extract (I) that -40 °C include: foaming to the first temperature The coffee-of (II) cooling foaming is derived from the first temperature to the second temperature for being lower than the first temperature The coffee-of (III) cooling foaming is derived from second temperature to lower than -40 °C, wherein first temperature is 1 °C of coffee-extract for being higher than freezing point foaming, wherein second temperature is below the freezing point 3 °C, wherein the duration of step (II) be 5 to 90, preferably 10 to 60 minutes.
