The invention provides a fish egg custard, which is prepared from the following raw materials in part by weight: 15 to 25 parts of sea fish, 15 to 25 parts of egg, 3 to 15 parts of agaric, 3 to 5 parts of kelp, 3 to 15 parts of carrot, 3 to 15 parts of soybean, 3 to 10 parts of corn, 3 to 10 parts of millet, 3 to 10 parts of oat, 3 to 10 parts of buckwheat, a proper amount of medical stone water, a proper amount of seasonings such as lard, shallot, ginger, salt, chicken powder and the like. The sea fish is a food with rich nutrient; edible parts of the sea fish, such as bones, fins and heads, are ground; the fish bones have rich calcium and trace elements, and nutrient components are soluble and easy to be absorbed by human bodies; and the egg, the agaric, the carrot, the kelp and the like are added simultaneously, so the nutrients absorbed by the human bodies are more comprehensive, and the nourishing effect is better.