[Objective] The aim was to study the quantitative analysis of mulberry red pigment.[Method] Mulberry red pigment was extracted by using acid alcohol and macroreticular resin was purified.The pigment content was analyzed by color value method,extinction coefficient method,pH differential method and NaNO2-Al(NO3)3 method,respectively.[Result] The purified pigment was 14.8 times the color value of unpurified one.The mulberry red pigment content measured by extinction coefficient method was 0.015%.The one measu...