The invention discloses a reactive red dye composition. The composition comprises a component A and a component B, based on the component A and the component B, the mass percentage of the component Ais 5-95%, and the mass percentage of the component B is 5-95%; and the component A is at least one selected from compounds represented by a formula (I) in the description, and the component B is at least one selected from compounds represented by a formula (II), a formula (III) and a formula (IV) in the description. The reactive red dye composition provided by the invention is suitable for printing and dyeing of cellulosic fibers or fabrics containing the cellulosic fibers, and especially for printing; the reactive red dye composition has the characteristics of high solubility, excellent various color fastnesses and the like, fully meets various requirements of performance and environmental protection, and has wide market prospects.