Display substrate and display device

The utility model discloses a display substrate and a display device. The display substrate comprises a plurality of sub-pixels, at least one sub-pixel comprises a pixel driving circuit and a data signal line connected with the pixel driving circuit, the pixel driving circuit at least comprises a storage capacitor and a first transistor, the storage capacitor at least comprises a first pole plate and a second pole plate, and the first transistor is connected with the data signal line; in the direction perpendicular to the display substrate, the display substrate comprises a first conductive layer arranged on the substrate and a semiconductor layer arranged on the side, away from the substrate, of the first conductive layer, the first conductive layer at least comprises a data signal line, and the semiconductor layer at least comprises a first active layer of a first transistor; in at least one sub-pixel, the first active layer is connected with a data signal line through a via hole. According to the invention, the number of patterning processes is reduced, the production efficiency is effectively improved, the production cost is effectively reduced, and the product yield is improved to the greatest extent.