A foldable module, comprising: a metal frame disposed along a periphery of a flexible display panel; a protective housing configured to hold the flexible display panel and the metal frame; and a flexible hinge for securing to the protective housing to enable the housing and the flexible display panel to fold and position within a predetermined angular range; wherein the flexible hinge includes rotating shafts, fixed washers, biasing gaskets, movable washers, and disc springs, the rotating shafts configured to axially engage the fixed washers, the biasing gaskets, the movable washers, and the disc springs, and assembled therewith as a whole, and a distance between axes of two adjacent rotating shafts being kept constant; and wherein the fixed washers are configured to tight fit with the biasing gaskets and form an interference fit with the rotating shafts, the movable washers and the disc springs are configured to form a clearance fit with the rotating shafts, and wherein the disc springs provide axial friction to effect that the flexible hinge is able to be located within a predetermined angular range by adjusting the torque wherein the flexible hinge comprises at least four rotating shafts, each of which is configured to be arranged with at least two disc springs butting together, symmetrical sides of the butting disc springs each being provided with one movable washer and two biasing gaskets, forming four biasing gaskets arranged side by side on both ends of two movable washers, and wherein two of the fixed washers are provided at outer sides of the movable washer and the biasing gaskets so that the fixed washers are disposed to be staggered with respect to the movable washer and the biasing gaskets; and wherein the foldable module is characterized in that the rotating shafts each have a shaft diameter of 0.5mm~3.0mm, both ends of the rotating shaft each are provided with a chamfering, and a middle portion is cylindrical, for assembling with the disc springs, and both sides of the rotating shaft are configured as planes. a metal frame disposed along a periphery of a flexible display panel; a protective housing configured to hold the flexible display panel and the metal frame; and a flexible hinge for securing to the protective housing to enable the housing and the flexible display panel to fold and position within a predetermined angular range; wherein the flexible hinge includes rotating shafts, fixed washers, biasing gaskets, movable washers, and disc springs, the rotating shafts configured to axially engage the fixed washers, the biasing gaskets, the movable washers, and the disc springs, and assembled therewith as a whole, and a distance between axes of two adjacent rotating shafts being kept constant; and wherein the fixed washers are configured to tight fit with the biasing gaskets and form an interference fit with the rotating shafts, the movable washers and the disc springs are configured to form a clearance fit with the rotating shafts, and wherein the disc springs provide axial friction to effect that the flexible hinge is able to be located within a predetermined angular range by adjusting the torque wherein the flexible hinge comprises at least four rotating shafts, each of which is configured to be arranged with at least two disc springs butting together, symmetrical sides of the butting disc springs each being provided with one movable washer and two biasing gaskets, forming four biasing gaskets arranged side by side on both ends of two movable washers, and wherein two of the fixed washers are provided at outer sides of the movable washer and the biasing gaskets so that the fixed washers are disposed to be staggered with respect to the movable washer and the biasing gaskets; and wherein the foldable module is characterized in that the rotating shafts each have a shaft diameter of 0.5mm~3.0mm, both ends of the rotating shaft each are provided with a chamfering, and a middle portion is cylindrical, for assembling with the disc springs, and both sides of the rotating shaft are configured as planes.