Foldable display device and foldable terminal

A foldable display device, comprising a flexible screen, a folding mechanism, a bendable flattening sheet, and two sets of sliding mechanisms, wherein the folding mechanism, the flattening sheet, and the flexible screen are laminated in sequence, and the folding mechanism, the flattening sheet, and the flexible screen are fixedly connected to each other at a middle folding position;

• the two sets of sliding mechanisms each comprise a first spring, a first sliding member, a second spring, and a second sliding member, wherein the two first springs are fixedly connected to two ends of the folding mechanism respectively, the first spring, the first sliding member, the second spring, and the second sliding member in each set of sliding mechanism are connected in sequence in a direction away from the folding mechanism, and the first springs and the second springs are configured to generate elastic deformation so as to make the first sliding members and the second sliding members slide;
• and
• two ends of the flattening sheet are fixedly connected to the first sliding members of the two sets of sliding mechanisms respectively, and two ends of the flexible screen are fixedly connected to the second sliding members of the two sets of sliding mechanisms, respectively.