Preparation method and application of Chinese medicine extract for 'prescription for treating diarrhoea with abdominal pain'

The invention discloses a preparation method for a Chinese herbal extract 'prescription for treating diarrhoea with abdominal pain', comprising the following steps: (1) fried rhizoma atractylodis macrocephalae, white paeony root, fried dried orange peel and divaricate saposhnikovia root are taken as raw materials, alcohol solution or water is taken as solvent to extract the raw materials to obtain the extracting solution; the weight ratio of the raw materials is as follows: fried rhizoma atractylodis macrocephalae: white paeony root: fried dried orange peel: divaricate saposhnikovia root is equal to 1:1:0.75:0.5; (2) the obtained extracting solution is concentrated until the volume of the extracting solution is 6-9 times of the weight of the raw materials, namely, 1Kg of the raw materialscorresponds to 6-9L of extracting solution; (3) the concentrated solution obtained in step (2) is diluted by water with 3-5 times of volume and then the supernatant is extracted; (4) the supernatant is absorbed by macroporous resin column, the eluted part of the alcohol is collected to obtain the alcohol eluent; (5) the obtained alcohol eluent is concentrated and dried to prepare the Chinese herbal extract. The invention also relates to the application of the Chinese herbal extract 'prescription for treating diarrhoea with abdominal pain' prepared by the method in preparing the medicines for curing irritable bowel syndrome of intestinal canal.