Pd@Ru bimetallic nanoparticles deposited on carbon black electro-catalysts have been fabricated by microwave-assisted polyol reduction method and investigated for methanol electro-oxidation(MEO). The structure and electro-catalytic properties of the as-prepared catalysts were characterized by XRD, SEM, TEM and cyclic voltammetry(CV) techniques. The results showed that the introduction of Ru element(2-10 wt%) into Pd 20 wt%/C(hereafter, denoted as Pd/C) produced a series of core-shell structured binary catalysts. Pd@Ru 5 wt%/C(hereafter, denoted as Pd@Ru5/C) catalyst displayed the highest catalytic activity towards MEO. And the mass activity of Pd@Ru5/C electrode catalyst at E =-0.038 V(vs. Hg/HgO) was 1.42 times higher than that of Pd/C electrode catalyst. In addition, the relationship between the catalytic stability for MEO on Pd@Ru/C catalysts and the value of Jbp/Jfp(the ratio of MEO peak current density in the negative scan and positive scan) were also investigated. The result demonstrated that Pd@Ru5/C offering the smallest value of Jbp/Jfpdisplayed the best stable catalytic performance. Pd @ Ru bimetallic nanoparticles deposited on carbon black electro-catalysts have been fabricated by microwave-assisted polyol reduction method and investigated for methanol electro-oxidation (MEO). The structure and electro-catalytic properties of the as-prepared catalysts were characterized by XRD The results showed that the introduction of Ru element (2-10 wt%) into Pd 20 wt% / C (hereafter, expressed as Pd / C) produced a series of core- Pd @ Ru 5 wt% / C (hereafter, expressed as Pd @ Ru5 / C) catalyst displayed the highest catalytic activity towards MEO. And the mass activity of Pd @ Ru5 / C electrode catalyst at E = -0.038 V (vs. Hg / HgO) was 1.42 times higher than that of Pd / C electrode catalyst. In addition, the relationship between the catalytic stability for MEO on Pd @ Ru / C catalysts and the value of Jbp / Jfp (the ratio of MEO peak current density in the negative scan and positive scan) were also investigated. The result demo nstrated that Pd @ Ru5 / C offering the smallest value of Jbp / Jfpdisplayed the best stable catalytic performance.