The present disclosure provides a light-emitting plate and a preparation method thereof and a display terminal, wherein the light-emitting plate includes a drive substrate and light sources. The light-emitting plate further includes light reflecting structures, one of light sources is located between two adjacent light reflecting structures. Each of the light reflecting structures includes a first side surface and a second side surface facing an adjacent light source, respectively. One end of the first side surface and one end of the second side surface are connected to the drive substrate. In one of the light reflecting structures, both of the first side surface and the second side surface are concave, and the first side surface and the second side surface are recessed toward each other.