The present application provides a splicing display device. The splicing display device includes at least two display devices, a middle frame and a light emitting diode (LED) substrate. Each two adjacent display devices are spliced to form a gap. The display device includes a backplate and is arranged on the backplate. The middle frame includes a support part and a fixing part connected to the support part, the support part is arranged on the two panels and covers the gap. The fixing part is arranged in the gap and is detachably connected to the backplate. The LED substrate is arranged on the support part.