Starch is a high polymer of glucose, in the catering industry, also known as Qianfen general formula (C6H10O5) n stages of hydrolysis to disaccharide is maltose, the chemical formula is (C12H22O11), fully hydrolyzed glucose, is the chemical formula (C6H12O6). Starch has two types of amylose and amylopectin. The starch is stored in the plant body nutrients stored in the various types of plants have a high starch content in seeds and tubers.