The invention discloses a marine organism type enteral nutrition preparation for diabetes patients, a preparation method of the marine organism type enteral nutrition preparation and application. The nutrition preparation includes, by weight, from 3 to 15 parts of algal polysaccharides, from 1 to 5 parts of marine edible animal protein peptide powder, from 3 to 5 parts of microalgae oil, from 0.3to 2 parts of spirulina powder, from0.1 to 1 part of taurine, from 40 to 45 parts of balsam pear polysaccharide or pumpkin polysaccharide, from 10 to 15 parts of soybean protein isolate powder, from 7 to 10 parts of medium chain triglyceride, from 3 to 8 parts of konjac dietary fibers, from 1 to 5 parts of fruit and vegetable powder, from 0.1 to 0.5 part of wheat bran, from 0.1 to 0.5 part of alpha-lipoic acid and a trace of trace element additives. Marine active functional matters with unique pharmacologic bioactivity are reasonably compounded according to needs of nutrition and metabolism of the diabetes patients, and the personal enteral nutrition preparation for the diabetes patients is developed, provides balanced nutrition for the diabetes patients and former diabetes patients, effectively relieves malnutrition, prevents diabetes, assists in regulating blood sugar level, can effectively prevent diabetes complications, and is favorable for increasing the quality of life of the patients and promoting rehabilitation.