The bovine serum albumin (BSA) adsorption character of pure porous titanium (PPT), acid-alkali treated porous titanium (AAPT) and alkali-heat treated porous titanium (AHPT) was investigated. The effect of surface modification on the protein adsorption behavior of porous titanium was discussed. In addition, the surface properties of the samples, including surface morphology, phase composition, roughness and contact angles, were examined by SEM, XRD, stylus profiler and contact equipment, respectively. Results show that after surface modification all the surface properties of the porous titanium change obviously, and the protein adsorption ability is enhanced evidently.