Introduce: Many animals, such as poultry, livestock and fish have heavy requirements to choline. Choline chloride prevents fat accumulation and denaturation of liver and kidney as well as perosis. Its shortage will result in a retarded growing, uncoordinated movements, and poor fertility. Adding choline in the bait of all kinds of fish and shrimp, the growth of fish and shrimp will be accelerated, thus high yielding will be obtained. Usage in Animal Feed Auxiliary feed for livestock and especially used in layer feed and premix feed, poultry and aquatic animal. Choline chloride can promote feed digestion , put on animals' weight, raise laying rate or producing milk rate, cure disease such as rickets,osteomalacia and anaemia etcDosage 3% added in Pre mixed feed, 1.5% added in Formulated feed will be better.