The invention discloses an irregularly-shaped display panel and a display device. The display area of the irregularly-shaped display panel is provided with an irregularly-shaped boundary, the display panel comprises low-brightness pixels and conventional pixels, the pixels form a plurality of pixel rows and a plurality of pixel lines, the pixel rows or the pixel lines comprise pixel groups, the pixel groups comprise first pixel groups and second pixel groups, the number of pixels adjacent to the regularly-shaped boundary in the first pixel groups is greater than that of pixels adjacent to the irregularly-shaped boundary in the second pixel groups, and the number of the low-brightness pixels in the first pixel groups is greater than or equal to that of the low-brightness pixels in the second pixel groups; the routing direction of a data line is a second direction, the pixels comprise at least three sub-pixels, and in the second direction, the opening heights of the sub-pixels inside the low-brightness pixels are smaller than those of the sub-pixels inside the conventional pixels; the irregularly-shaped boundary faces the direction of the display area, and the opening area of the low-brightness pixels is gradually increased. According to the irregularly-shaped display panel and the display device disclosed by the invention, the irregularly-shaped display phenomenon of a sawtooth is improved.