N, N - diene propyl methyl amine is a kind of very good non-toxic monomer. Through homopolymerization and copolymerization of synthetic contains five membered ring efficient cationic organic polymer flocculant, due to its high positive charge density, good solubility in water, no pollution, in the new ink dye, oil drilling, water treatment and as paper strengthening agent, antistatic agent has been widely used.