Methionine is an important amino acid species of animal feed in an essential additive added methionine animal feed to help animals grow rapidly in a short time, it saves about 40% of the feed. In particular, feed poultry feed, methionine is the first limiting amino acid. Livestock methionine deficiency will cause stunted growth, weight loss, decreased kidney function, muscle atrophy, deterioration and other fur. Dietary methionine 1kg, 50kg equivalent to the nutritional value of fish meal (added in an amount of 0.05% to 0.2%). Methionine feed configuration has DL- methionine, methionine hydroxy, hydroxy methionine calcium salt, of N- hydroxymethyl methionine. In the feed industry, the demand for methionine great, especially the variety of amino acids in nutritional feed additives, 60% of methionine, lysine 30%, about 10% of other amino acids.