Fuente: WIPO "hemp" The present invention adopts the method combining chemical and mechanical treatments, the technological process are: choosing hemp-dried softening-bundling up and charging in the cage-boiling-hot water washing-beating-dewatering-vibrating the hemp, softening-oil removing-vibrating the hemp-stoving-refining dried hemp. In the boiling and not water washing procedures, the internal circulation high speed jet flow and ultrasonic wave are adopted. Compared with the old techniques, said invention can save time of more than 3 hr, decrease the basic concentration by 60% increase 10% of finished product, heigten the strength of fibre by 30% and save great amount of equipment investment.