A capacitive touch sensor, comprising: a plurality of first touch electrodes, a plurality of second touch electrodes, and a first crack blocking ring (27, 29); the plurality of first touch electrodes respectively extend along a first direction, and at least one of the plurality of first touch electrodes comprises a plurality of first touch sub-electrodes arranged side by side in the first direction and electrically connected with each other; the plurality of second touch electrodes respectively extend along a second direction intersecting with the first direction, and at least one of the plurality of second touch electrodes comprises a plurality of second touch sub-electrodes arranged side by side in the second direction and electrically connected with each other; the plurality of first touch electrodes are arranged side by side along the second direction, and the plurality of second touch electrodes are arranged side by side along the first direction; the capacitive touch sensor comprises an opening region (421, 422), and a transitional region (424, 425) and a touch functional region sequentially laid out from a center of the opening region (421, 422); the center of the opening region (421, 422) and a center of the capacitive touch sensor do not coincide; the touch functional region surrounds the transitional region (424, 425); the plurality of first touch electrodes and the plurality of second touch electrodes are positioned in the touch functional region; the plurality of first touch sub-electrodes and the plurality of second touch sub-electrodes surround at least a part of the opening region (421, 422); and the first crack blocking ring (27, 29) is positioned in the transitional region (424, 425) and at least partially surrounds the opening region (421, 422); the first crack blocking ring (27, 29) is a metal ring; characterized in that: the first crack blocking ring (27, 29) has at least one first fracture (271, 291), and at least one of the at least one first fracture (271, 291) has a tip. the plurality of first touch electrodes respectively extend along a first direction, and at least one of the plurality of first touch electrodes comprises a plurality of first touch sub-electrodes arranged side by side in the first direction and electrically connected with each other; the plurality of second touch electrodes respectively extend along a second direction intersecting with the first direction, and at least one of the plurality of second touch electrodes comprises a plurality of second touch sub-electrodes arranged side by side in the second direction and electrically connected with each other; the plurality of first touch electrodes are arranged side by side along the second direction, and the plurality of second touch electrodes are arranged side by side along the first direction; the capacitive touch sensor comprises an opening region (421, 422), and a transitional region (424, 425) and a touch functional region sequentially laid out from a center of the opening region (421, 422); the center of the opening region (421, 422) and a center of the capacitive touch sensor do not coincide; the touch functional region surrounds the transitional region (424, 425); the plurality of first touch electrodes and the plurality of second touch electrodes are positioned in the touch functional region; the plurality of first touch sub-electrodes and the plurality of second touch sub-electrodes surround at least a part of the opening region (421, 422); and the first crack blocking ring (27, 29) is positioned in the transitional region (424, 425) and at least partially surrounds the opening region (421, 422); the first crack blocking ring (27, 29) is a metal ring; characterized in that: the first crack blocking ring (27, 29) has at least one first fracture (271, 291), and at least one of the at least one first fracture (271, 291) has a tip.