Display backboard and display device

The utility model discloses a display backboard and a display device, and belongs to the technical field of display. The display backboard comprises a substrate, a plurality of transmission lines, a plurality of first signal lines, a plurality of second signal lines, a plurality of sub-pixel areas and a plurality of first shielding structures. According to the utility model, the first shielding structures corresponding to the transmission lines are arranged on the substrate, and the orthographic projection of at least part of the transmission lines in the connection area on the substrate is located in the orthographic projection of the corresponding first shielding structures on the substrate. The connection area comprises the connection position of the transmission line and the second signal line, and the first shielding structure is connected with the constant-voltage line to access the constant-voltage signal, so that the first shielding structure can shield the electric signal of the corresponding transmission line in the connection area, and the influence of the transmission line on the pixel signal of the sub-pixel area of the connection area is avoided; the problem that the uniformity of the display backboard is poor is solved, and the effect of improving the brightness uniformity of the display device is achieved.