Porous palladium (Pd) bulk was prepared by spark plasma sintering (SPS). Afterwards oxidation and deoxidation on the surface of the porous Pd bulk was conducted in the temperature range of 500~600 °C. The microstructure, surface area, porosity and pore size distribution were investigated. The microstructure and chemical composition of the porous Pd bulk surface were characterized by SEM and XPS. The results show that porous Pd bulk with excellent mechanical properties and higher porosity (87.88%) can be prepared by SPS at 550 °C. Carbonaceous impurities on the porous Pd bulk surface can be removed and the surface area of porous Pd bulk as well as the roughness can be increased by oxidation and deoxidation reactions