The present disclosure relates to an OLED display panel, a method for manufacturing the same and a display device. The OLED display panel includes: a substrate; a thin film transistor and a photosensitive device for fingerprint recognition on the substrate; a transparent dielectric layer on the substrate and the thin film transistor; a light-shielding-planarization single layer on the transparent dielectric layer, wherein the light-shielding-planarization single layer has a first hole exposing the transparent dielectric layer, and a projection of the first hole on the substrate overlays with a projection of the photosensitive device on the substrate; and an organic light emitting device on the light-shielding-planarization single layer, wherein the organic light emitting device is connected to a source/drain electrode of the thin film transistor through a second hole penetrating the light-shielding-planarization single layer.