The present disclosure provides a cover plate for a flexible substrate which includes a first hardened layer, a second hardened layer and a polymer thin film layer provided between the first hardened layer and the second hardened layer, wherein a hardness of the first hardened layer is less than that of the second hardened layer, a hardness of the polymer thin film layer is less than that of the first hardened layer, and a bending radius of the first hardened layer is greater than that of the second hardened layer.