The shape indicators of sperical Ti-6Al-4V powders prepared by four kinds of method were quantitatively analyzed by image analysis technology, The sphericity, ellipticity, outgrow and roughness were measured . The results show the mean sphericity of powders is all above 90%. Sphericity of powders reduces sequentially from plasma rotating electrode process(PREP),plasma torch atomization(PA), plasma inert gas atomization(PIGA) to electrode inert gas atomization(EIGA), while the corresponding roughness successively increases. Satellite ball adhesion on the powder surface increases in turn from PREP, PA, EIGA to PIGA.For powders prepared by PREP method, the finer the particle size range, the higher the sphericity and the smaller the average roughness.The difference of shape indicator is related to the principle of preparation methods. The shape indicator of metal powder can be scientific quantitative analyzed by image analysis technology.