Provided is a gastritis and gastric ulcer-treating agent, which is prepared and developed by processing solar salt and bamboo tree into heat-treated purple salt, in which the heat-treated salt, which is prepared by firstly heat-treating mineral rich solar salt and bamboo tree at a high temperature, that is, 1,100° C. or more； and two or more time repeating the heat-treating of the first heat-treated salt and bamboo tree under the above-described conditions, includes a large amount of hydrogen sulfide-producing material and has a purple color, and when the heat-treated salt is used along with aspirin, the heat-treated salt has an excellent effect on preventing stomach damage, thereby significantly reducing bleeding, ulcer, and the damage of mucous membrane, induced by aspirin.
