Abstract：The risk of carcinogenesis in chronic atrophic gastritis is related to the degree and scope of atrophy and intestinal metaplasia. The strategy to reduce this risk lies in alleviating or reversing atrophy and intestinal metaplasia， and traditional Chinese medicine（ TCM） is an important means for treating atrophic gastritis. Based on the theory of mild fire supplements qi，Professor XU Su holds that the treatment of senile chronic atrophic gastritis of deficiency of spleen and stomach type should focus on invigorating the spleen and replenishing qi，as well as strengthening the spleen and warming yang. This aims to delay and reverse the progression of atrophy and intestinal metaplasia， and prevent carcinogenesis. On the basis of CHEN Shiduo's Wentu Decoction，he adds Chuanxiong Rhizoma，Corydalis Rhizoma， and Rabdosiae Rubescentis Herba to form the modified Wentu Decoction.