A flexible substrate is provided. The flexible substrate includes: a flexible layer, wherein the flexible layer has a plurality of notches which have a first maximum width along a stretching direction in a stretched state of the flexible layer and have a second maximum width along the stretch direction in an unstretched state of the flexible layer, and wherein the first maximum width is greater than the second maximum width. A flexible display apparatus including the above flexible substrate and a method for producing the flexible substrate are also provided.