The formula of ebony for treating chronic gastritis is as follows: ebony l0g, 7 white peppers, 3 jujubes and proper amount of vinegar. Its preparation method includes grinding dark plum and white pepper into powder, removing the core and mashing jujube, and mixing the three flavors evenly. Its administration method is 1 dose per day, and it is taken with vinegar soup. Its main therapeutic effect is chronic gastritis.