Health-preserving fish refers to some fish that are considered to have health-preserving effects. According to the relevant public information, these fish are considered to have certain medicinal value and health preservation function in the theory of traditional Chinese medicine. Common health fish are grass carp, crucian carp, carp, bighead carp and silver carp. Recommend it to people who need health care. Grass carp is considered to have the effects of clearing away heat and toxic materials, nourishing yin and moistening dryness, resolving phlegm and relieving cough, and is suitable for people with spleen and stomach weakness, dyspepsia and cough with excessive phlegm. Bighead carp, on the other hand, is considered to have the functions of nourishing kidney and blood, nourishing liver, improving eyesight and moistening skin, and is suitable for people with liver and kidney deficiency, blurred vision and dry skin.