A touch display panel, including a first substrate; a plurality of pixel units on first substrate and arranged in array; a touch electrode layer on first substrate, including a plurality of touch electrodes arranged in array and insulated from each other, a touch signal line layer, including a plurality of touch signal lines; a control circuit for providing touch signal to touch electrode, each touch signal line electrically connecting one touch electrode with control circuit, and each touch electrode electrically connected with at least one touch signal line; an insulation layer between touch electrode layer and touch signal line layer, including a plurality of through holes, touch electrodes electrically connected with touch signal lines via through holes; wherein distribution density of through hole is not more than 0.1 and defined as: ratio of the number of through hole to the number of pixel unit covered by one touch electrode.