The invention discloses a traditional Chinese medicinal enema for treating chronic colitis. According to the traditional Chinese medicinal science, the pathogenesis of chronic colitis is mainly due to syndromes of dampness-heat due to spleen deficiency and qi depression to blood stasis, especially develops in colonic mucosa and submucosa inflammation and ulcer changes, and is characterized by stomachache, diarrhea, mucous bloody stool and tenesmus in clinic. Therefore, traditional Chinese medicines, which have effects of clearing heat, drying damp, diminishing swelling, promoting granulation, removing pattogenic heat from the blood and toxic material from the body, relieving diarrhea, diminishing inflammation, resolving tetany and relieving pain, including traditional Chinese medicinal Swamp Mahogany Leaf, champion dutchmanspipe root, mongolian oak bark, Scutellaria baicalensis, cortex fraxini, Cape jasmine, Rhizoma Atractylodis Macrocephalae, licorice root, Codonopsis pilosula, cortex albiziae, fruits of Litsea rubescens, cortex cinnamomi and hurricane lamp, are selected to be made into the enema. Through clinical tests of our public health centre, the total effective rate of the enema reaches 96.3% and it is obviously better than a control group. In addition, patients have no adverse reaction after taking the medicine. Therefore, the medicine is worth of clinical popularization and application.