A touch structure and a touch display panel are provided. The touch structure includes a first region and a second region. Touch electrodes of the first region are touch electrodes with a flawless contour and touch electrodes of the second region are touch electrodes with a notched contour. The touch electrodes of the first region include first boundary electrodes, and the touch electrodes of the second region include second boundary electrodes. The first boundary electrode includes a first side and the second boundary electrode includes a second side. The first side and the second side are provided with a compensation structure which is configured to form a compensation boundary line between the first side and the second side and the length of the compensation boundary line is greater than the length of a reference boundary line.