The invention relates to the field of a traditional Chinese medicine formula, in particular to a cinnamon tuckahoe powder for treating gastritis, which is prepared from cinnamon, dried ginger, tuckahoe, cyperus tuber, costus root, angelica, red sage root and evodia rutaecarpa which are used as raw materials by the following steps: drying eight Chinese herbal medicines of cinnamon, dried ginger, tuckahoe, cyperus tuber, costus root, angelica, red sage root and evodia rutaecarpa, grinding the Chinese herbal medicines into fine powder, screening the powder with a 100-mesh screen, bottling and sealing the bottle cap for standby. The medicine is characterized in that the raw materials comprise the following components by weight percent: 10-12% of cinnamon, 8-10% of dried ginger, 11-14% of tuckahoe, 19-22% of cyperus tuber, 14-17% of costus root, 13-15% of angelica, 7-9% of red sage root and 8-11% of evodia rutaecarpa. The invention has low cost, good curative effect for treating chronic gastritis and no toxic and side effects, has the functions of promoting circulation of qi and relieving pain, reinforcing the spleen to promote digestion, lowering the adverse flow of qi and arresting vomiting, disintegrating masses and reducing the stagnation, and the like, and is suitable for various gastritis.