At least one embodiment of the present disclosure provides a display module, a splicing screen and a display device, the display module includes: a backlight module and a display component, the backlight module includes a middle frame, and an edge of the middle frame is provided with a support part that is detachable; an edge of the display component is adhesively bonded to the support part through a first adhesive, and the support part is configured to support the display component, the support part can be quickly disassembled from the middle frame through an independent structural design, such that the reworkability of the display module can be greatly improved without affecting the display component, so as to reduce production cost.