Rear cover and box body device of high-definition LED display screen

The utility model discloses a high definition LED display screen rear cover and box body device which comprises an LED box body frame, the upper portion and the lower portion of the LED box body frame are respectively provided with an end cover plate, the upper surface and the lower surface of the LED box body frame are respectively provided with four separation pull blocks, the inner sides of the separation pull blocks are movably provided with operation clamping grooves, and the operation clamping grooves are connected with the LED box body frame. An operation clamping groove is formed in the bottom face of the LED box body frame, a connecting rod is arranged on the bottom face of the operation clamping groove, the connecting rod is inserted into the LED box body frame and is in sliding connection with the LED box body frame, a positioning block is fixedly installed at the bottom end of the connecting rod, an anti-disengaging inserting plate is arranged on the bottom face of the positioning block, and side