agar, also known as agar AGAR. Gelatin products made from the algal genera Gracilaria and Gracilaria are the most commonly used curing agents for microbial media, and are also used in canned meat, fish, poultry and cosmetics, pharmaceuticals and dental treatments. AGAR is a polysaccharide extracted from seaweed and is one of the most widely used seaweed gums in the world. It has a wide range of applications in food industry, pharmaceutical industry, daily chemical industry, biological engineering and many other aspects, AGAR used in food can significantly change the quality of food, improve the grade of food [1]. The price is high. Its characteristics: with coagulability, stability, can form complex with some substances and other physical and chemical properties, can be used as thickener, coagulant, suspension agent, emulsifier, preservative and stabilizer. Widely used in the manufacture of orange and various beverages, jelly, ice cream, pastries, soft candy, canned, meat products, eight-treasure porridge, tremella bird's nest, soup food, cold food and so on. AGAR is used in the chemical industry, medical research, as a medium, ointment base and other uses.