Doxorubicin-loaded PLGA magnetic nanoparticles were prepared by the double emulsion method.The properties of the nanoparticles such as the morphology,size,magnetism,rate of encapsulation and drug-loading amount were characterized.The results demonstrated that the nanoparticles with magnetism dispersed well in the emulsion.The size of the particles were uniformly distributed in the range of 20±5 nm.The rate of encapsulation and the drug-loading amount were 41.2%and 4%,respectively.The preparation method of t...