Herb  Flocculating Chitosan is a natural multi-purpose high-performance efficient clarifying agent, the amino-acid formed polymer material with positive charge in its molecules, and a large number of suspending particles in the liquid medicine with negative charge will interattract and result in deposit. Its unique “overlapping " clarifying function makes it a substitution of ethanol, so it makes a great impact on the traditional "water, alcohol" technology and has become a major innovation in pharmaceutical industry of Chinese medicine. In addition, it is effective to remove instable components of protein, tannin, starch and other colloid, so the solution can be easy to filter to clarify the products, and improve product stability; it has a strong chelating effect on a variety of heavy metal ions and provides a guarantee with the product export target. Chitosan dedicated to clarifying the technology may simplify the traditional preparation process ,shorten the production cycle, and reduce pharmaceutical costs, therefore it is an new flocculant and is an ideal alternative of Synthetic Flocculation Agent which is easy to use, stable to operate, low-cost, safe ,non-toxic, and non-polluting,