Cationic fluorinated polyacrylate emulsion-free emulsion was synthesized using poly(2-(dimethylamino)ethyl methacrylate)-b-poly(hexafluorobutyl acrylate) (PDMAEMA-b -PHFBA) synthesized by reversible addition fragamentation chain transfer（RAFT）polymerization as a stabilizer via emulsion-free emulsion polymerization. The latex particle and polymer were characterized by means of Fourier-transform infrared spectroscopy(FTIR), 1H nuclear magnetic resonance spectroscopy (1H-NMR), transition electron microscopy(TEM )and dynamic light scattering (DLS). The results showed that when the dosage of PDMAEMA-b-PHFBA was 2.4%，the emulsion displayed the good stability and high monomer conversion, and the latex particle with a core-shell structure and narrow particle size distributiond was obtained. The leather finished by cationic fluorinated emulsion-free emulsion showed good water-proof and oil-proof properties. The water and diiodomethane contact angle of finished leather increased with increase of the amount of hexafluorobutyl acrylate. When the dosage of hexafluorobutyl acrylate was 10%, the water contact angle was up to 125?and the diiodomethane contact angle was up to 81.5?