The invention provides an 
OLED display panel and a 
display device. The 
OLED display panel comprises a substrate layer and a display base material layer which are stacked, wherein the display base material layer comprises a switching device layer, an organic light-emitting device layer, a packaging layer and a 
color film layer which are stacked; a 
waveguide film locking layer is also arranged between the organic light-emitting device layer and the 
color film layer; the 
waveguide film locking layer comprises an inner reflection film layer, and at least one first 
refraction film layer is arrangedat the side, close to the 
color film layer, of the inner reflection film layer; at least one second 
refraction film layer is arranged at the side, close to the organic light-emitting device layer, ofthe inner reflection film layer. The 
refractive index of the first 
refraction film layer and the 
refractive index of the second refraction film layer are both lower than the 
refractive index of the inner reflection film layer. The 
waveguide film locking layer changes the propagation direction of lateral light and limits the propagation direction in the inner reflecting film layer by utilizing thetotal reflection principle from light density to light sparseness, and lateral 
light emission is effectively controlled, so that optical 
crosstalk among different pixels is solved, the problems of poor viewing angle and color separation are avoided, and the display effect is improved.