The invention provides an astaxanthin enteral nutrition emulsion, a dry emulsion and a preparing method and application of the astaxanthin enteral nutrition emulsion, and belongs to the field of foodproduction. The astaxanthin enteral nutrition emulsion is prepared from, by mass, 1-5% of hydroxypropyl methyl cellulose, 1-3% of maltodextrin, 1-4% of corn oil, 0.002-0.006% of astaxanthin oiling agent and 89-96% of water. The astaxanthin enteral nutrition emulsion is stable in character, good in mouthfeel, quick to absorb, easy to digest and absorb, and capable of meeting the daily nutritional requirement of a user. The components of astaxanthin help the body of a user to repair itself and boost immunity; the astaxanthin enteral nutrition emulsion can serve as both common food to be eaten bynormal people or weak people and a nutrition preparation to support clinical enteral nutrition for patients with gastrointestinal dysfunction or a nutrition support preparation for common patients tosupplement comprehensive nutrients and function components necessary to daily life.