A foldable cover plate comprising a flexible substrate (200) and at least two hard plates is provided. The flexible substrate (200) has a hard area and a bent area. The number of the hard areas is the same as the number of the at least two hard plates, and the hard areas and the hard plates are in a one-to-one relationship, with each hard plate located on the surface of the corresponding hard area. The bent area is between two adjacent hard areas, and the foldable cover plate, under an external force, can be bent from the bent area. A corresponding display module and a corresponding terminal device are also provided.