The invention relates to edible toothpaste which is prepared from olive extracts and does not contain fluorine. A preparation method of functions components, namely, the olive extracts of the toothpaste includes the following steps that firstly, extraction is performed with an ethanol solution with the concentration of 50-80%; secondly, acidolysis is performed with hydrochloric acid with the concentration of 0.1-0.3 mol/L; thirdly, neutralization and concentration are performed; fourthly, ethyl acetate is used for extraction, and the product is concentrated and dried. The olive extracts have good antibacterial activity and are harmless to mammalian cells. The extracts and a toothpaste system are mixed to make the toothpaste, the olive extracts with a good antibacterial effect can serve as an anti-dental-cavity agent, fluoride does not need to be added, the toothpaste has the inflammation diminishing and bleeding stopping effect which common toothpaste cannot achieve, the toothpaste can be used for assisting in preventing and treating oral ulcer, swelling and aching of gingivae, gingival bleeding, decayed teeth, oral malodor and other oral cavity and dental diseases, and the toothpaste conforms to the requirements of customers for safe, environment-friendly and natural toothpaste.