Display substrate and display device

The invention discloses a display substrate. The display substrate comprises a substrate and a laminated structure arranged at the vertex angle of an IC chip on the substrate, wherein the laminated structure comprises a composite insulating layer structure arranged on the substrate and a buffer structure arranged on the composite insulating layer structure; the vertex angle of the IC chip is located obliquely above the laminated structure, and the laminated structure comprises a first region arranged inside the vertex angle of the IC chip and a second region arranged outside the vertex angle of the IC chip; the composite insulating layer structure comprises an isolation structure, and the isolation structure comprises a plurality of grooves sunken in the upper surface of the composite insulating layer structure; a part of the grooves in the isolation structure are located in the first region, and the other part of the grooves are located in the second region; and the buffer structure covers the upper surface