The invention discloses an oral composition containing 
Ectoine and 
hyaluronic acid and application of the oral composition. The oral composition is prepared from, by 
mass, 0.1-5% of high molecular weight 
hyaluronic acid or salt thereof, 0.1-5% of low molecular weight 
hyaluronic acid or salt thereof, 0.01-1% of tea 
polyphenol, 1-3% of 
xylitol, 0.1-1% of 
Ectoine and the 
balance water, and the totalpercentage is 100%. Accordingly, the 
Ectoine, different molecular weights of hyaluronic acid or salt thereof, tea 
polyphenol and 
xylitol are compounded, the bio-safety is high, the synergetic effect is achieved, the effects of 
nursing wound surfaces, diminishing 
inflammation, promoting healing and the like are achieved, and the oral composition is applicable to oral care application such as oral care after 
cancer chemotherapy and oral 
ulcer care and can also be applied to the field of medical products, 
medical equipment and disinfection products.