The present invention provides a manufacturing method of chewing gum and product thereof, which employs nano technology to uniformly distribute a number of nano antibacterial powders on the outer surface of a whitening particle to form a tooth protection unit； then, fully evenly mixes a plurality of tooth protection units with the chewing gum colloid； and after forming, completes the product. Because the ingredient of the whitening particle is the same as the main composition of tooth and the outer surface thereof is uniformly distributed with a number of nano antibacterial powders, the present invention has the antibacterial effect as well. Accordingly, when being chewed, the tooth protection unit is decomposed by the saliva and released from the chewing gum. Because the tooth protection unit has the same ingredient as the main composition of tooth, it will deeply penetrate into the damaged tooth and appropriately fill the damaged portion of tooth without falling off, and it may be further attached on the tooth surface to form a protection film, so as to prevent the dental caries, and also achieve the purposes of tooth whitening and oral health caring at the same time.一種「口香糖之製法及其成品」，主要係利用奈米技術將一美白顆粒之外表面均勻分布若干奈米抑菌粉粒，使之形成一牙齒保護單元，之後，將複數個牙齒保護單元與口香糖膠體充份均勻混合，待加工成型後，即完成本成品；由於該美白顆粒本身成分與牙齒主要組成成分相同，加上外表面均勻分布若干奈米抑菌粉粒，使之同時具抑菌效果；藉此，咀嚼時，利用口水分解使牙齒保護單元從口香糖中釋放出，由於牙齒保護單元與牙齒主要組成成分相同，因此會滲入深植原本已受損之牙齒並適時填補牙齒受損部位，而不脫落，此外，附著於牙齒表面使之形成一保護膜達到預防蛀牙之功效，且亦同時具有牙齒美白及保健口腔衛生之目的。
