Abstract: A method is provided for establishing an ulcerative colitis (UC) animal model and use of the model. The ulcerative colitis animal model uses Canis lupus familiaris dogs as the modeling animals and uses acetic acid to induce canine ulcerative colitis. The experimental results can be directly generalized to the human body. The modeling manner is easy to operate, establishes a stable model, is easy to reproduce, and has a low cost, which provides more animal model options for evaluation of responsiveness to drugs and therapeutic effect in research and development of UC therapeutic drugs.