Geba script is a syllables used by Naxi people. A huge contradiction between Logographic sign and phonetic function in Dongba script provides motivation for the birth of pure syllable writing. Because there is a great retarding force for Dongba script’s continuing to develop into the syllables writing, Geba script is prompted to appear. Geba script, after a long preparation, mainly borrows Dongba script, Chinese, Tibetan characters and rules and one-syllable-for-one-character expression method. In the past, Geba script was developing during the process of assisting Dongba script’s use. Finally it forms with mark of writing independent sentence.