Sodium alginate can be made into various gel food. It can be used to maintain good colloid form, without drainage or shrinkage, suitable for frozen food and man-made imitation food. It can also be used as layers of protective coating to cover fruit, meat, poultry and aquatic products, making them without direct contact with air, thus extending the storage time. Added in sugarcoating of bread, stuffed filling, cover layer of dessert, canned food, etc, it is a good type of self-curing forming agent, making products maintain the original shape at high temperature, freezing and acidic media. Taking the place of agar, it can also be made into flexible, non-stick tooth, transparent crystal candy. Sodium alginate is a indispensable dietary fibre for our body with unique nutrition. Combined with organic matter, it can decrease cholesterol in serum and liver, so as to inhibit the increase of total fat and fatty acid concentration. Besides, it can also improve the digestion and absorption of nutrient, at the same time inhibit the absorption of harmful elements such as radioactive strontium, cadmium etc. Long-term consumption of health food with sodium alginate can help cure hypertension, coronary heart disease, obesity, diabetes and intestinal tract diseases etc. In addition, sodium alginate can also be used as feed binder, pet food binder, monomer raw materials of cosmetics.