The invention discloses fructus amomi ultrafine
powder and a preparation method thereof. When the ultrafine
powder is prepared, the preparation method comprises the steps that firstly, fructus amomi dry products are crushed, soaked in
liquid nitrogen for a period of time, and then conventionally ground to 50-60 meshes, and fructus amomi coarse
powder is obtained; then the fructus amomi coarse powder and auxiliary materials comprising talcum powder,
mannitol,
camphor and
bornyl acetate are evenly mixed according to the
mass ratio being of (50-100) to :1, and thus mixed powder is obtained; and then the mixed powder is put into an ultrafine grinder to be ground for 20-30 minutes under the
anhydrous condition, thus the fructus amomi ultrafine powder is obtained, and finally, the fructus amomiultrafine powder is dried and sterilized to obtain a finished product. By adopting the preparation method, fructus amomi, especially
amomum longiligulare, can be ground into the evenly-distributed fructus amomi ultrafine powder with the
fine grain size, the obtained fructus amomi
fine powder has the high contents of volatile oil and the
bornyl acetate and can be directly used as
medicine, waste ofactive ingredients in the fructus amomi is avoided, and the overall
utilization rate of the fructus amomi is increased.