1. A flexible screen comprising:a display substrate comprising a first portion, a second portion, and a third portion sequentially connected, the second portion folded to form an end portion of the flexible screen; and
a support plate for supporting the display substrate,
wherein the first portion and the third portion of the display substrate are opposite to each other, the support plate is arranged between the first portion and the third portion of the display substrate, and one end of the support plate faces one surface of the second portion; and
wherein the one surface of the second portion facing the support plate is provided with an end heat dissipation device.