The cationic polymerized fluorosurfactants, N-(perfluoroalkyl acid ethyl ester)-N-(ethyl alcohol acrylate) dimethyl bromide(PFDM), with different length of fluorocarbon chain were synthesized using perfluoroalkyl ethyl alcohols(PFEA) as raw materials. The structures of the products were identified by means of 1H NMR. The influence of the length of fluorocarbon chain on the properties of PFDM was studied by zeta potential measurement and surface tension method, and the polymerizability of the PFDM was proved. The results show that the aggregation numbers of micells and the surface activity of PFDM increase with the increasing of the length of fluorocarbon chain, the CMC of PFDM declines exponentially with the increasing of the length of fluorocarbon chain, and PFDM has good polymerizability.