An electronic device, comprising: a housing comprising a first portion and a second portion configured to move relative to each other; a reel rotatably arranged to the first portion; and a flexible display screen assembly having an end connected to the second portion and another end coupled to the reel, wherein the reel is configured to rotate to release the flexible display screen assembly when the first portion and the second portion move away from each other, wherein the flexible display screen assembly comprises a flexible display screen and a flexible support stacked and fixedly connected with the flexible display screen, and the flexible support abuts against the first portion to keep the flexible display screen flat when the first portion and the second portion move away from each other, wherein the first portion comprises a first top plate, and the flexible support is configured to be arranged between the flexible display screen and the first top plate to fill a gap between the flexible display screen and the first top plate when the first portion and the second portion move away from each other, wherein the second portion comprises a second top plate, wherein the flexible display screen comprises: a first region fixed on the second top plate and overlapping the second top plate; and a second region connected to the first region and at least partially arranged in the first portion, characterized in that the second top plate is attached on the first top plate and arranged between the flexible display screen and the first top plate, the flexible support is arranged to a bottom of the second region and exceeds beyond the second region, and an exceeding portion of the flexible support is connected to the reel, the flexible support has a same thickness as the second top plate. a housing comprising a first portion and a second portion configured to move relative to each other; a reel rotatably arranged to the first portion; and a flexible display screen assembly having an end connected to the second portion and another end coupled to the reel, wherein the reel is configured to rotate to release the flexible display screen assembly when the first portion and the second portion move away from each other, wherein the flexible display screen assembly comprises a flexible display screen and a flexible support stacked and fixedly connected with the flexible display screen, and the flexible support abuts against the first portion to keep the flexible display screen flat when the first portion and the second portion move away from each other, wherein the first portion comprises a first top plate, and the flexible support is configured to be arranged between the flexible display screen and the first top plate to fill a gap between the flexible display screen and the first top plate when the first portion and the second portion move away from each other, wherein the second portion comprises a second top plate, wherein the flexible display screen comprises: a first region fixed on the second top plate and overlapping the second top plate; and a second region connected to the first region and at least partially arranged in the first portion, a first region fixed on the second top plate and overlapping the second top plate; and a second region connected to the first region and at least partially arranged in the first portion, characterized in that the second top plate is attached on the first top plate and arranged between the flexible display screen and the first top plate, the flexible support is arranged to a bottom of the second region and exceeds beyond the second region, and an exceeding portion of the flexible support is connected to the reel, the flexible support has a same thickness as the second top plate.