The utility model relates to an identification device for a film viewing lamp, which is used for the reasonable utilization of a radiograph film viewing lamp. The device comprises a film viewing lamp (1), a piece of black paper (2) and a standard density film (3), wherein a hole (2.1) with a diameter of 4mm is arranged in the center of the black paper (2), and the surface of the film viewing lamp (1) is covered by the black paper (2); and the standard density film (3) is provided with a plurality of holes (3.1) with different blackness values, and the standard density film (3) is adhered on the surface of the black paper (2). The surface of the film viewing lamp is shielded by the black paper having the hole with the diameter of 4mm, the holes with different blackness values of the standard density film are respectively aligned to the hole with the diameter of 4mm, the brightness capable of penetrating through each hole is measured, the blackness values are detected according to standard requirements, a maximum blackness value D1 which can be viewed by the film viewing lamp is recorded, and an identifier is made and adhered on the film viewing lamp. The film viewing lamp can be suitable for viewing a film with a film blackness range of 2.0-D1. According to the identification device for the film viewing lamp, the problem of identifying and reasonably utilizing the film viewing lamp is fundamentally solved.