An erythritol chewing gum, which is made of the following materials by weight: 5 to 20 shares of gardenia flower extract, 1 to 5 shares of vitamin C, 1 to 5 shares of vitamin E, 5 to 20 shares of dandelion; 20 to 40 shares of erythritol, 10 to 30 shares of polydextrose, 10 to 40 shares of chewing gum base, 1 to 5 shares of honey. The preparing method is: a. material preparation. b. gum base dryingsoft. c. beating mixing. The present invention can not only clean mouth, prevent occurring mouth disease, also has the function of heat-clearing and detoxifying, fat-reducing and blain-removing.