The copolymers of polysiloxane and acrylate with methacryloxypropyl trimethoxysilane (MPS) -polydimethylsiloxane (PDMS) oligomer as macromonomer and Gemini surfactant as co-emulsifier were prepared by emulsion copolymerization and characterized by 1HNMR, Gel-permeation chromatography (GPC), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and FT-IR.Firstly, the oligomers of MPS-PDMS with different Si-O-Si chain length (8, 12, 24 and 36) were synthesized by the hydrolysis of MPS and the ring-opening polymerization of octamethyl tetracyclosiloxane (D-4), the (HNMR)-H-1 and FT-IR spectra indicated that when the reaction time was prolonged to 2 h, more than 90% of -Si (OCH3)(3) groups were hydrolyzed; Then, the emulsion polymerization was carried out with the oligomer as macromonomer and Gemini Surfactant as co-emulsifier. XPS investigation of the latexes showed that with the increase of Si-O-Si chain length, more and more polysiloxane occupied the outer layer of membrane, which agreed well with the conclusion of contact angle and AFM measurements. With Gemini surfactant as co-emulsifier in the system, the PDMS content in the system could reach 50%, which was far higher than the other reported value.