Display screen box convenient to disassemble, assemble and dissipate heat

The utility model discloses a display screen box convenient to disassemble and assemble and dissipate heat, which comprises an outer shell, vertical hanging plates symmetrically arranged above and below the outer shell and side frames symmetrically arranged on the two sides of the outer shell, connecting corners are arranged at the four corners of the inner wall of the outer shell, each connecting corner comprises an L-shaped frame, and the L-shaped frames are connected with the vertical hanging plates. The side edge and the top edge of the L-shaped frame are each provided with a screw receding hole, a clamping piece is arranged on the side, facing the interior of the outer shell, of the L-shaped frame, limiting holes are formed in the corner angle, away from the L-shaped frame, of the clamping piece, the vertical frame comprises a supporting plate, extending plates are constructed on the two sides of the supporting plate, positioning holes matched with the screw receding holes are formed in the extending pla