Display screen box and spliced display screen

The display screen box comprises a frame, the frame is provided with a first edge and a second edge which are oppositely arranged, the first edge is provided with a through hole, the second edge is provided with a lock hole, the lock hole comprises a round hole part and an extension part, the extension part is communicated with the peripheral wall of the round hole part, the through hole corresponds to the round hole part, and the through hole is communicated with the round hole part. And internal threads are arranged on the wall surface of the round hole part. The internal threads are arranged in the round hole parts of the lock holes, so that two adjacent display screen boxes can be connected and fastened by using the rotary lock catch structure and can also be connected and fastened by using screws, and the fastening and connecting modes of the display screen boxes are enriched. When two adjacent display screen boxes have frequent disassembly and assembly requirements, the two display screen boxes can be c