Sulfobutyl ether - β-cyclodextrin sodium is a new drug preparation excipient, belongs to anionic highly water-soluble cyclodextrin a sulfonic acid derivative. It can be well integrated with drug molecules to form non-cochemicalbook valence complexes, improve the stability, water solubility, safety and effectively improve the biological activity of drug molecules. It has little renal toxicity, can alleviate hemolytic drugs and control drug release rate