The invention discloses a preparation method of a toothpaste for preventing and treating gingival bleeding. The preparation method comprises the following steps: a, weighing the following raw materials, 15 to 30 parts of a wetting agent, 0.2 to 0.7 part of an anticorrosion agent, and 40 to 60 parts of distilled water, adding the raw materials into a reaction kettle, heating the raw materials to 88 to 98 DEG C, boiling the raw materials till the solution is thick, b, adding 40 to 60 parts of an abrasive agent, 1 to 10 parts of a bonding agent, 0 to 0.05 part of an essence, and 0.1 to 1 part of a sweetening agent into the reaction kettle, stirring for 1.5 to 2h, adding 1 to 6 parts of a blowing agent, stirring for 0.5 to 1h, adding 1 to 4 parts of an extracting solution of a traditional Chinese medicine extract, stirring for 8 to 12min, c, transferring the materials in the step b to a roller, so as to roll the materials, keeping rolling for 2 to 3h, and d, packing the rolled materials in a vacuum condition. The toothpaste prepared through the preparation method has the advantages of sterilization and antiphlogosis, and prevention and treatment of gingival bleeding from the root.