A display device, comprising: a frame, wherein a width of the frame is adjustable; a flexible screen installed on the frame, wherein a width of the flexible screen is adjustable. the frame comprising: a case formed with a plurality of sliding chutes parallel to each other, wherein each sliding chute comprises a first chute mouth and a second chute mouth opposite to the first chute mouth; a first bracket comprising a first sliding block, wherein the first sliding block is slidably inserted into at least one sliding chute, and the first sliding block passes through the first chute mouth of the sliding chute; and a second bracket comprising a second sliding block, wherein the second sliding block is slidably inserted into at least one sliding chute, and the second sliding block passes through the second chute mouth of the sliding chute; characterized in that a brake locking mechanism is provided between the first sliding block and a corresponding sliding chute, the brake locking mechanism comprises a lock tongue and a latch, the lock tongue is a flexible lock tongue and is elastically arranged inside the first sliding block 1021, a shape of the lock tongue is a fan-shaped protruding structure, and the latch is located at the sliding chute near the first chute mouth. a frame, wherein a width of the frame is adjustable; a flexible screen installed on the frame, wherein a width of the flexible screen is adjustable. the frame comprising: a case formed with a plurality of sliding chutes parallel to each other, wherein each sliding chute comprises a first chute mouth and a second chute mouth opposite to the first chute mouth; a first bracket comprising a first sliding block, wherein the first sliding block is slidably inserted into at least one sliding chute, and the first sliding block passes through the first chute mouth of the sliding chute; and a second bracket comprising a second sliding block, wherein the second sliding block is slidably inserted into at least one sliding chute, and the second sliding block passes through the second chute mouth of the sliding chute; characterized in that a brake locking mechanism is provided between the first sliding block and a corresponding sliding chute, the brake locking mechanism comprises a lock tongue and a latch, the lock tongue is a flexible lock tongue and is elastically arranged inside the first sliding block 1021, a shape of the lock tongue is a fan-shaped protruding structure, and the latch is located at the sliding chute near the first chute mouth. a case formed with a plurality of sliding chutes parallel to each other, wherein each sliding chute comprises a first chute mouth and a second chute mouth opposite to the first chute mouth; a first bracket comprising a first sliding block, wherein the first sliding block is slidably inserted into at least one sliding chute, and the first sliding block passes through the first chute mouth of the sliding chute; and a second bracket comprising a second sliding block, wherein the second sliding block is slidably inserted into at least one sliding chute, and the second sliding block passes through the second chute mouth of the sliding chute; characterized in that a brake locking mechanism is provided between the first sliding block and a corresponding sliding chute, the brake locking mechanism comprises a lock tongue and a latch, the lock tongue is a flexible lock tongue and is elastically arranged inside the first sliding block 1021, a shape of the lock tongue is a fan-shaped protruding structure, and the latch is located at the sliding chute near the first chute mouth.