The present disclosure relates to the field of display devices and discloses a foldable display device comprising: a main body structure and a flexible screen provided on a surface of the main body structure; the main body structure includes two flat plate areas and a bending area connecting the two flat plates and making the two flat plate areas have an opening and closing angle of 0 degrees to at least 180 degrees between; the bending area having a minimum bending radius at the time of bending so that the flexible screen attached to the surface of the bending area also has a minimum bending radius, which is greater than a critical bending radius of the flexible screen. The present disclosure allows the flexible screen to have a minimum bending radius when the screen is folded, preventing the flexible screen from being damaged by excessive bending.