The invention provides a reactive black dye composition which comprises 30-85 parts by weight of ingredient A, 1-40 parts by weight of ingredient B, 5-50 parts by weight of ingredient C, 1-40 parts byweight of ingredient D and 0--40 parts by weight of ingredient E, wherein the ingredient A is at least one of compounds shown as formula (1) as shown in the specification; the ingredient B is at least one of compounds shown as formula (2) as shown in the specification; the ingredient C is at least one of compounds shown as formula (3) as shown in the specification; the ingredient D is at least one of compounds shown as formula (4) as shown in the specification; and the ingredient E is at least one of compounds shown as formula (5) as shown in the specification. When the reactive black dye composition is used for fabric printing and dyeing, the composition has a good deep dyeing property, and various excellent color fastnesses, particularly outstanding fastness to water washing and rubbing.