A decoction of a traditional Chinese medicine and a preparation method therefor. The preparation method for the decoction comprises: mixing Chinese medicinal herbs with water, and carrying out decoction to obtain a mixture； cooling the mixture, cutting and smashing a product, and carrying out filtering； homogenizing the product； canning the product, and sterilizing the product. The decoction has a high absorption rate in intestinal tracts, and can be preserved in a normal temperature for a long time.
