This application provides a support, a display assembly, and an electronic device. The support includes a hard plate layer. At least one gap is disposed on a part that is of the hard plate layer and that corresponds to a bending area. A flexible strip is disposed in each gap. A length direction of the flexible strip is the same as an extension direction of the gap, so that when the display is disposed on the support. There is also a support structure at a position corresponding to the gap of the hard plate layer on a flexible display, to avoid a failure problem such as a black spot that occurs because the display is squeezed at the position corresponding to the gap of the hard plate layer, and improve reliability of the display assembly.