Examples of the disclosure provide an OLED touch display panel, a display device and a method for detecting a touch operation zone, relate to the field of touch display, and may achieve an incell touch display panel. The display panel has an OLED component, which comprises a first electrode; a piezoresistive material layer, which is above the first electrode of the OLED component; a touch electrode layer, which is above the piezoresistive material layer; and a first stripe electrode, a second stripe electrode, a third stripe electrode and a fourth stripe electrode, which are provided above the touch electrode layer and not contacted with each other.