Abstract: ZnO nanorods synthesized with hydrothermal method were treated with hydrogen- plasma.Their morphologies，structures and optical properties were investigated by scanning electron microscope，X-ray diffractometer，UV-Vis spectrophotometer and photoluminescence. The results showed that hydrogen-plasma treatment had no affect on the morphologies and structures of ZnO nanorods. It was found that with the increase of the treatment time，the absorption edge of the ZnO nanorods shifted to shorter wavelength，the intensity of near-band edge ultraviolet emission peak increased，and that of the visible emission decreased.

Key words: hydrogen-plasma, ZnO, nanorods, optical property