The invention belongs to the technical field of
traditional Chinese medicine preparations, and discloses an extraction and purification method of industrial hemp total
terpene and a preparation. The extraction and purification method comprises the following steps of: (1) stirring and extracting industrial hemp medicinal material
powder with 50%-95%
ethanol in an amount which is 5-10 times that of the industrial hemp medicinal material
powder at
room temperature, and concentrating an extracting solution under reduced pressure at a temperature of 50-70DEG C to obtain a concentrated solution; (2) adding 4-8 times of hot water into the concentrated solution for dispersion, performing cooling to
room temperature, and performing centrifugal layering and separation to obtain supernatant; (3) carrying out heat preservation on the supernatant at 80-95DEG C, carrying out molecular
distillation, and collecting light components to obtain an industrial hemp total
terpene crude extract; and (4) taking the industrial hemp total
terpene crude extract, adding 3-10 times of
distilled water for
steam distillation, collecting light components, performing standing at
room temperature, and collecting the upper layer to obtain the industrial hemp total terpene extract with a total industrial hemp terpene content of greater than or equal to 95% and a transfer rate of greater than or equal to 99%. The method is environment-friendly in process, the extraction rate and the purity are higher than those of a traditional method for directly distilling medicinal materials with
water vapor, and the obtained industrial hemp total terpene is suitable for being prepared into a medicinal preparation.