Principle of phase-change ink printing was analyzed. According to ISO 13660, printing quality was evaluated by measuring dot diameter and roundness, line blurriness and roughness etc. The data was measured by CCD capture and phase-change printing quality was analyzed objectively and quantitatively with image quality evaluation software. Measurement results showed that phase change ink jet can achieve high quality printing results in general paper and the smoothness of material surface has certain influence on line quality printed by phase-change ink.