The present invention provides an OLED display panel and a display device. The OLED display panel includes a luminescent substrate having a first luminescent region and a bending region, and an encapsulated thin film being disposed on the luminescent substrate. The encapsulated thin film disposes a first optical device therein. The projection of the first optical device on the luminescent substrate is at the junction of the first luminescent region and the bending region, to make light from the first luminescent region enter into the bending region by aid of the first optical device.