The invention discloses a preparation method for superfine
bupleurum powder under a normal temperature; the preparation method comprises the following steps of: firstly selecting
radix bupleuri, radix scutellariae,
pinellia, dangshen and liquorice, cleaning and
cutting the
radix bupleuri, the radix scutellariae, the
pinellia, the dangshen and the liquorice into sections;
drying the sections, and then respectively
grinding the sections to obtain crude
traditional Chinese medicine powders; uniformly mixing the crude
traditional Chinese medicine powders according to proportions of 3:3:2:3:1, then placing the mixed crude
traditional Chinese medicine powder in a rod mill to be ground, leading the ground
powder to enter a special bidirectional
airflow sieving
machine through air supply to pass through a
sieve with 500 meshes, sieving the ground powder to obtain powder with the particle size of less than or equal to 25 micrometers, conveying the powder into a
cyclone material collecting device through air currents generated by a draught fan to be collected, thereby obtaining the superfine
bupleurum powder finished product; and collecting and conveying the powder which is not sieved by the
sieve with 500 meshes into the rod mill for secondary cyclic
grinding. The preparation method has the advantages that the whole preparation process is carried out under the normal temperature, and low temperature or special auxiliary conditions are not needed; the particle size of the prepared
medicine finished product is less than or equal to 25 micrometers, and the wall-broken rate of cells and the
bioavailability are greatly increased; and the bidirectional
airflow sieving
machine adopted in the preparation method simplifies the preparation process of the superfine
bupleurum powder.