Preparation method for flexible display substrate

The invention discloses a preparation method for a flexible display substrate, relates to the technical field of the flexible display substrate, and solves the problem that a device on the flexible display substrate is damaged in peeling off the flexible display substrate and a rigid bearing substrate and the problem of relatively large radius of curvature of the flexible display substrate and the like. The preparation method comprises the steps of forming a concave-convex pattern layer on the rigid bearing substrate; preparing the flexible display substrate on the rigid bearing substrate where the concave-convex pattern layer is formed, wherein the flexible display substrate comprises a display device; the pattern in the concave-convex pattern layer avoids the display device; and peeling off the flexible display substrate and the rigid bearing substrate to obtain the flexible display substrate. The preparation method provided by the invention is used for preparing the flexible display substrate.