1. A flexible display screen, comprising:a display panel comprising a display surface and a support base away from the display surface, wherein the support base is a stepped structure;
at least one reel mechanism disposed on a side of the display panel, wherein a part of the display panel is wrapped around inside the reel mechanism; and
a support structure comprising a plurality of support plates;
wherein when the display panel is drawn out, the plurality of support plates in the support structure forms a laminated structure, and a step of the support base of the display panel closest to the reel mechanism is disposed on a topmost layer of the plurality of support plates; and
wherein when the display panel is expanded, the plurality of support plates in the support structure corresponding thereto is drawn out, and the plurality of support plates drawn out form a stepped structure, which fits the stepped structure of the support base of the expanded display panel, and the display surface of the expanded display panel forms a flat surface.