A display base plate and a manufacturing method therefor, a display panel and a display apparatus, relates to the technical field of display. The display base plate includes: a substrate (101), a first electrode layer (102) formed on the substrate (101), and a first pixel definition layer (103) and a second pixel definition layer (104) formed on the first electrode layer (102); the first pixel definition layer (103) divides the substrate (101) into a plurality of pixel regions (105), each pixel region (105) includes a plurality of subpixel regions (1050) distributed along a first direction, and two adjacent subpixel regions (1050) are separated by the second pixel definition layer (104); in the first direction, surfaces of each pixel region (105) in contact with the first pixel definition layer (103) include a plurality of first curved surfaces (1061) and a plurality of second curved surfaces (1062), and the first curved surfaces (1061) and the second curved surfaces (1062) are protruded away from the pixel region (105) to which they belong.