The invention discloses toothpaste for preventing halitosis. The toothpaste for preventing the halitosis is prepared from the following raw materials in parts by weight: 15 to 17 parts of blue vitriol, 13 to 18 parts of amino acetic acid, 9 to 14 parts of aluminium hydroxide, 1 to 3 parts of glycerol, 3 to 5 parts of glucose oxidase, 5 to 15 parts of herba menthae, 10 to 20 parts of herba lophatheri, 5 to 15 parts of herba plantaginis, 15 to 25 parts of bulbus fritillariae cirrhosae, 5 to 15 parts of herba gynostemmatis pentaphylli, 15 to 25 parts of radix notoginseng, 15 to 25 parts of radixet caulis mahoniae and 5 to 8 parts of silica. The toothpaste has bactericidal and bacteriostatic effects, so as to achieve the purposes of preventing and treating the halitosis, and further, an oralcavity is refreshing after use.