The invention discloses a novel fish nutrition agent, which comprises the following ingredients by weight: 0.1-0.3 parts of glycine, 0.3-0.6 parts of glutamine, 1-3 parts of protein powder, 1-3 parts of vitamin C, 1-3 parts of vitamin E, 6-8 parts of mashed garlic, 1-3 parts of sodium chloride, 1-3 parts of soluble glass and 800-1200 parts of water. Compared with the prior art, the novel fish nutrition agent has the beneficial effects that the usage effect is good, preparation technology is simple, and the cost is low.