The invention relates to a preparation method for extracting an effective part from 
traditional Chinese medicine radix bupleuri and an application of the effective part obtained by utilizing the method and a preparation thereof in medicines for preventing and treating 
liver fibrosis, hepatocirrhosis, 
chronic hepatitis and the like. The preparation of the effective part of the 
radix bupleuri can be granules, soft capsules, capsules, dripping pills, tablets, dispersing tablets, 
effervescence tablets, injection and the like. The invention has simple operation method and utilizes a 
modern medicine effect sieving technology, an extracting and purifying technology, a preparation technology and a 
quality control technology to carry out deep development on the 
radix bupleuri preparation; the effective part of the radix bupleuri and the preparation thereof obtained by utilizing the technological method of the invention are rich in 
active components, have definite effective components, obvious 
pharmacological action, obviously enhanced 
medicine effect, stable performance, controllable quality, safety, reliability and small 
dose and are beneficial to the transportation and storage of the 
medicine and the taking of a patient.