A flexible display device, comprising: a flexible display panel; a plurality of functional members on a side of the flexible display panel, wherein the plurality of functional members comprises a first functional member, a second functional member, and a third functional member, the first functional member, the second functional member and the third functional member are sequentially stacked on the flexible display panel, and the third functional member is closer to the flexible display panel than the first functional member; a back film on the other side of the flexible display panel; a supporting member on a side of the back film away from the flexible display panel; and a plurality of adhesive layers, the plurality of adhesive layers comprising: a first adhesive layer between the first functional member and the second functional member; a second adhesive layer between the second functional member and the third functional member; a third adhesive layer between the third functional member and the flexible display panel; a fourth adhesive layer between the flexible display panel and the back film; and a fifth adhesive layer between the back film and the supporting member, wherein the third functional member comprises a touch module, characterized in that: the touch module comprises a touch substrate, a sensor layer on the touch substrate, and an adhesive material layer between the sensor layer and the touch substrate, and the modulus of the adhesive material layer is not less than the modulus of each of the first adhesive layer, the second adhesive layer, the third adhesive layer, the fourth adhesive layer and the fifth adhesive layer. a flexible display panel; a plurality of functional members on a side of the flexible display panel, wherein the plurality of functional members comprises a first functional member, a second functional member, and a third functional member, the first functional member, the second functional member and the third functional member are sequentially stacked on the flexible display panel, and the third functional member is closer to the flexible display panel than the first functional member; a back film on the other side of the flexible display panel; a supporting member on a side of the back film away from the flexible display panel; and a plurality of adhesive layers, the plurality of adhesive layers comprising: a first adhesive layer between the first functional member and the second functional member; a second adhesive layer between the second functional member and the third functional member; a third adhesive layer between the third functional member and the flexible display panel; a fourth adhesive layer between the flexible display panel and the back film; and a fifth adhesive layer between the back film and the supporting member, a first adhesive layer between the first functional member and the second functional member; a second adhesive layer between the second functional member and the third functional member; a third adhesive layer between the third functional member and the flexible display panel; a fourth adhesive layer between the flexible display panel and the back film; and a fifth adhesive layer between the back film and the supporting member, wherein the third functional member comprises a touch module, characterized in that: the touch module comprises a touch substrate, a sensor layer on the touch substrate, and an adhesive material layer between the sensor layer and the touch substrate, and the modulus of the adhesive material layer is not less than the modulus of each of the first adhesive layer, the second adhesive layer, the third adhesive layer, the fourth adhesive layer and the fifth adhesive layer. the touch module comprises a touch substrate, a sensor layer on the touch substrate, and an adhesive material layer between the sensor layer and the touch substrate, and the modulus of the adhesive material layer is not less than the modulus of each of the first adhesive layer, the second adhesive layer, the third adhesive layer, the fourth adhesive layer and the fifth adhesive layer.