The embodiment of the invention provides a touch display panel and a display device. The touch display panel comprises a display substrate and a touch sensing layer. The display substrate comprises afirst electrode, a pixel definition layer, an organic light-emitting layer and a second electrode, a pixel area and a non-pixel area are defined by the pixel definition layer, and the organic light-emitting layer is located in the pixel area. The touch sensing layer comprises a first touch electrode and a second touch electrode. The orthographic projections of the first touch electrode and the second touch electrode on the display substrate are located in the non-pixel area. Due to the fact that the first touch electrodes and the second touch electrodes of the touch sensing layer are aligned with the non-pixel area of the pixel defining layer, the optical visibility of grid lines composed of the first touch electrodes and the second touch electrodes during light emitting is improved, and the moire effect and grid visibility are reduced.