The invention belongs to the field of fine chemical engineering and relates to red active dye. The red active dye is a compound with a general structural formula (I) and in the formula, all groups are defined in the specification. The red active dye is mainly used for dyeing and printing of protein fibers, synthetic fibers, cellulose fibers and blended fabrics. After dyeing, the fabric has a gorgeous color, good level-dyeing properties, tone reappearance, very high adhesion ratio and color fixing rate, and excellent color fastness. The red active dye can satisfy environment and ecological protection market requirements on dye.