A fluorinated acrylate copolymer emulsion with core-shell structure was synthesized by semi-continuous emulsion polymerization using methyl methacrylate (MMA ), butyl acrylate (BA) as the raw material, hexafluorobutyl methacrylate as fluorinated acrylate monomer, ammonium persulfate (APS) as initiator, sodium dodecyl sulfate (SDS) and polyoxyethylene octyl phenyl ether (OP-10) as emulsifier and taking water as dispersion medium. The as-prepared latexes are characterized by Fourier transforms infrared (FT-IR) spectroscopy. The hydro-oleophobic of copolymer is determined by contact angle meter. The typical core-shell structure is proved by differential scanning calorimetry (DSC). The results show that the copolymer emulsion has good hydro-oleophobic when the content of hexafluorobutyl methacrylate is 15%, used the delay loading method, the water contact angle of the coating surface is 104 °, the hexadecane contact angle is 75 °. Key words: fluorinated acrylate; copolymer; emulsion; hydro-oleophobic; contact angle