A touch display panel and a touch display device are provided. The touch display panel has a display region and a non-display region arranged on a periphery of the display region, and the display region has a non-rectangular shape. The touch display panel comprises a plurality of first touch electrodes and a plurality of second touch electrodes. The plurality of first touch electrodes is arranged in the display region. The plurality of second touch electrodes is arranged at a side of the first touch electrode next to the non-display region. The second touch electrode has a different shape from the first touch electrode. An area of the first touch electrode is S1, an area of the second touch electrode is S2, and S1 and S2 satisfy: 0.85S1S21.15S1.