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1 IntroductionrnCollagen is a frequently occurring protein found in poultry,livestock and human body,esp.in the hair,skin,bone cartilage,tendon and so on.It forms the strongly insoluble fibers and serves as connective tissue supporting materials.Nowadays it became one of the most important raw materials of bio-engineering materials which are widely used in various fields including cosmetics,biomedical and foods industries.With the outburst of multiple diseases from cows and pigs such as bovine spongiform encephalopathy(BSE),related authorities in different countries have estabhshed many restrictions on trading collagen from mammalians.Due to this ground scientists began to identify new resources of collagens.