1. can be used as a cationic monomer to form copolymer and homopolymer. 2. can be used in dyeing and finishing auxiliaries as advanced formaldehyde-free color-fixing agent, it can foam film in the fabric and improve color fastness. 3. can be used in papermaking , coating and antistatic agent, AKD sizing promoter as retention and drainage agent. 4. also can be used to decolor, flocculate, and purity effectively and non-toxic in water treatment.