To further improve catalytic performance under solvent-free conditions, Pd/GO、Pd/rGO and Pd/C-HNO3 were studied with the commercial Pd/C with mass fraction of 10% as the control group. Among them, Pd/rGO exhibited the highest aniline yield within 1 h. Combined with the characterization results of XRD、XPS、N2-adsorption/desorption、SEM、TEM and HRTEM, the coupling effect between Pd nanoparticles and rGO nanosheets is confirmed, which results in the highest Pd specific surface area （178.37 m2/g） and Pd dispersion（43.75%） of Pd/rGO in the three Pd-based catalysts. When Pd/rGO catalyzed the hydrogenation of nitrobenzene in the condition of 10 g/L Pd/rGO，1 MPa H2，90 ℃，5 mL nitrobenzene, the yield of aniline increased with the reaction time. Nitrobenzene was completely transformed and the yield of aniline reached 100% within 100 min. In addition, Pd/rGO exhibited 97.1% aniline yields after recycling tests of nine times.