A flexible screen assembly, comprising: a first sliding element; a second sliding element slidably connected to the first sliding element, and being slidable to a first state that the second sliding element is overlapped with the first sliding element, and to a second state that the second sliding element is unfolded with respect to the first sliding element; and a flexible screen connected to the first sliding element and the second sliding element; wherein the first sliding element comprises a first inner side surface, the second sliding element comprises a second inner side surface, characterized in that: wherein the first sliding element is provided with a first rotation shaft; wherein, in the first state, a portion of the flexible screen covers the second sliding element, a side edge of the flexible screen bypasses a peripheral side of the first rotation shaft, and another portion of the flexible screen is received into the first sliding element or the second sliding element; wherein the first sliding element further comprises a first extension surface, the second sliding element further comprises a second extension surface; wherein, an included angle is defined between the first inner side surface and the first extension surface; and an included angle is defined between the second inner side surface and the second extension surface; wherein, in the second state, the second extension surface and the first extension surface are coplanar and have the same orientation, and the flexible screen is unfolded on the first extension surface and the second extension surface; wherein, in the second state, the included angle between the first inner side surface and the first extension surface is complementary with the included angle between the second inner side surface and the second extension surface, the second sliding element is slid to the second state, the first inner side surface and the second inner side surface have opposite orientations and fit with each other. a first sliding element; a second sliding element slidably connected to the first sliding element, and being slidable to a first state that the second sliding element is overlapped with the first sliding element, and to a second state that the second sliding element is unfolded with respect to the first sliding element; and a flexible screen connected to the first sliding element and the second sliding element; wherein the first sliding element comprises a first inner side surface, the second sliding element comprises a second inner side surface, characterized in that: wherein the first sliding element is provided with a first rotation shaft; wherein, in the first state, a portion of the flexible screen covers the second sliding element, a side edge of the flexible screen bypasses a peripheral side of the first rotation shaft, and another portion of the flexible screen is received into the first sliding element or the second sliding element; wherein the first sliding element further comprises a first extension surface, the second sliding element further comprises a second extension surface; wherein, an included angle is defined between the first inner side surface and the first extension surface; and an included angle is defined between the second inner side surface and the second extension surface; wherein, in the second state, the second extension surface and the first extension surface are coplanar and have the same orientation, and the flexible screen is unfolded on the first extension surface and the second extension surface; wherein, in the second state, the included angle between the first inner side surface and the first extension surface is complementary with the included angle between the second inner side surface and the second extension surface, the second sliding element is slid to the second state, the first inner side surface and the second inner side surface have opposite orientations and fit with each other. wherein the first sliding element is provided with a first rotation shaft; wherein, in the first state, a portion of the flexible screen covers the second sliding element, a side edge of the flexible screen bypasses a peripheral side of the first rotation shaft, and another portion of the flexible screen is received into the first sliding element or the second sliding element; wherein the first sliding element further comprises a first extension surface, the second sliding element further comprises a second extension surface; wherein, an included angle is defined between the first inner side surface and the first extension surface; and an included angle is defined between the second inner side surface and the second extension surface; wherein, in the second state, the second extension surface and the first extension surface are coplanar and have the same orientation, and the flexible screen is unfolded on the first extension surface and the second extension surface; wherein, in the second state, the included angle between the first inner side surface and the first extension surface is complementary with the included angle between the second inner side surface and the second extension surface, the second sliding element is slid to the second state, the first inner side surface and the second inner side surface have opposite orientations and fit with each other.