Abstract: This paper is about the clinical experience of Professor Zhang Xiaoping in treating ulcerative colitis from the perspective of Qihua of spleen and stomach. Professor Zhang thinks that the pathogenesis of the disease is root deficiency and branch excess. Root deficiency refers to the spleen deficiency and branch excess refers to damp-heat， epidemic toxin， and cold and damp invading intestines and fu organs. The occur and development of the disease are related to the disorder of digesting， imbalance of dryness and dampness， and abnormal movement of qi. In clinical practices， methods like regulating the rising and descending of qi， clearing away the internal evils， regulating the inputting and outputting， defending from the external evils， caring about the digesting， and restoring the function of spleen and stomach， regulating the balance of dryness and dampness， and strengthen the function of intestines and fu organs.