LED display screen box body and LED display screen

The utility model discloses an LED display screen box body and an LED display screen, and belongs to the technical field of LED display screens. The LED display screen box body comprises a box body, afastening piece and a splicing seam adjusting piece, wherein the box body comprises a first side wall and a second side wall which are opposite to each other; the fasteners are used for connecting the first side walls and the second side walls of the two adjacent box bodies which are spliced with each other; the abutted seam adjusting piece is connected to the first side wall; the abutted seam adjusting piece is abutted against the second side wall of the adjacent box body; the splicing seam adjusting piece can move towards the second side walls of the mutually spliced adjacent box bodies soas to expand the splicing seam between the first side wall and the second side wall and move away from the second side walls of the mutually spliced adjacent box bodies so as to reduce the splicing seam between the first side