The embodiments of the disclosure disclose a flexible display apparatus. The flexible display apparatus includes a flexible substrate, a display device and a flexible encapsulation layer. The flexible substrate includes a first organic layer, an inorganic buffer layer, and a second organic layer, the inorganic buffer layer is between the first organic layer and the second organic layer, and the first organic layer includes inorganic nano-particles; the display device is located between the flexible substrate and the flexible encapsulation layer; the flexible encapsulation layer is configured to encapsulate the display device.