This paper reports the fabrication of ZnMnO semiconductor by high-dose Mn impla ntion. We studied the influence of implantation dose and annealing on its optica l properties. The broad band at 575cm-1 in Raman spectrum is attribut ed to defects related to high-dose Mn implantion. The vibration modes at 528cm-1 are considered to be associated with Mn impurities. Room temperature photoluminescence spectra show that the high-dose Mn implantion can enhance the intensity in visible band.