Fish is rich in protein and a variety of nutrients, with very low acidity, and it is particularly easy to reproduce bacteria. Therefore, when canned, it should be sterilized under high temperature and high pressure of 115-121 ℃. Such a high temperature has little effect on protein, but it will cause a large loss of B vitamins. Therefore, the vitamin B1 content of canned fish can be reduced to about half of that of fresh fish, and will be further reduced in long-term storage.

Canned fish is a ready to eat canned product made from fresh or frozen fish through processing, canning, adding seasoning, sealing and sterilization.

According to the different processing methods, canned fish can be divided into braised, eggplant juice, fresh fried, steamed, smoked, oil soaked, water soaked and other categories.