Fatty acid methyl ester sulfonate (MES) is a surfactant that can be used as calcium soap dispersant in the 1930s. It is a fatty acid anionic surfactant prepared from natural animal and vegetable oils. It is a highly efficient surfactant and calcium soap dispersant with the most development potential at home and abroad. Fatty acid methyl ester sulfonate is made from natural fatty acid methyl ester through sulfonation and neutralization. Fatty acid methyl ester sulfonate has a series of excellent properties, such as renewable, good environmental compatibility and biodegradability, hard water resistance, low irritation, good decontamination and compatibility. MES is mild, non-toxic, non irritating to human body and phosphorus free. These properties are better than Sodium Alkylbenzene Sulfonate (LAS). It is internationally recognized as the third representative surfactant to replace las. Because MES is safe and non-toxic chemicalbook, has strong resistance to hard water and can be completely biodegradable, it is known as a real green and environmental friendly surfactant, especially suitable for the production of phosphorus free, low phosphorus and environmental friendly detergents and care products. Fatty acid methyl ester sulfonate is mainly used in calcium soap dispersant, washing powder, tableware detergent, shampoo, soap, industrial light and heavy scale liquid detergent and other fields. It has a good application prospect in powder, liquid and hard surface cleaning agents. MES is a new type of surfactant with excellent performance. Compared with traditional surfactants, using this renewable natural oil raw material to replace the sulfonic acid from petroleum derivatives can effectively save more than 10% of the production cost for enterprises. At the same time, it has the concept of environmental protection and has more affinity for people. The advantages of cost and environmental protection will make MES detergent have stronger market competitive advantage than traditional detergent.