Fe₃O₄ magnetic nanoparticles were prepared by coprecipitation method and coated with SiO₂ via a sol-gel process, then a magnetic molecularly imprinted polymers (Fe₃O₄—MIPS) of bisphenol A were prepared by emulsion polymerization using BPA as template, α-methacrylicas as functional monomer,divinylbenzene as cross-linker, azobisobutyronitrile as initior. The Fe₃O₄—MIPS were characterized by Fourier transform infrared spectroscopy (FT—IR),Transmission electron microscopy(TEM) and Sample vibrating magnetometry(VSM) in order to elucidate the morphology, magnetic and other properties, the results showed that they possessed uniform distribution of particle size, which was about 15 nm, and with a good magnetic property.The results of adsorption experiment indicated that the Fe₃O₄—MIPS have a much higher adsorbability than Fe₃O₄—MNIPS, and it had a high selective adsorption for BPA, the Scatchard analysis results demonstrate that the maximum apparent adsorption quantity of BPA was 126.44 μmol/g.