Based on a secret prescription(Dongyuan Jiajiu),Compound Sea-horse Medicinal Liquor (CSM^) is prepared with spirit contained lower percent alcohol as carrier. The main components of CSML include sea-horse (Hippocampus) ,pipe-fish (Syngnathus) .sea-snake, the external genetals of the stag and the sea-snake,etc. With rich amino acids and trace elements,CSML can produce specific biological effects in the human body,such as syn-thesing ATP, promoting the secretion of endogenous androgens. The pharmacological and toxicological studies have shown that CSML can strengthen immune fumction,increase the body' s anti-fatigue action without any toxicity. Clinical observations have indicated that CSML can help reinforcing essence of the kidney and invigorating vital function .stimulating the blood circulation to relax muscles and tendons,as well as replenishing and reinforcing vital energy. As a pure natural and safe athletic tonic with ideal efficacy of increasing sport endurance,CSML srould be recommended.