The invention discloses a synthesizing method for acrylate copolymers with hydrophobicity. A small amount of compound emulgator and co-stabilizer is used for making acrylate monomers form uniform andstable miniemulsion. A miniemulsion polymerization method is adopted for obtaining acrylate copolymer emulsion, and after polymerization is finished, through a separation technology of demulsificationcohesion and many-time dissolution-sediment circulating operation, the acrylate copolymer with hydrophobicity is obtained. No obvious emulgator residues are contained in the obtained copolymer, the purity and hydrophobicity performance of the acrylate copolymers with hydrophobicity are improved, the using amount of fluorine-containing monomers is reduced, and the cost is reduced; a polymerizationsite of miniemulsion polymerization is oily monomer drops, it is avoided that in the conventional emulsion polymerization process, acrylate monomers need to be diffused to solubilizing micelles through an aqueous phase, the polymerization conversion rate of the fluorine-containing acrylate monomers with hydrophobicity is effectively improved, the discharging amount of fluorine-containing monomersis reduced, and environmental pollution is reduced. The synthesizing method has a good application prospect in the field of water-proof antifouling paint.