LED display screen for building

The utility model discloses an LED display screen for a building, which belongs to the technical field of LED display screens and comprises a protective cover, a display screen body is mounted in the protective cover, a reciprocating motor is fixedly connected to one side of an inner cavity of the protective cover, a gear is fixedly connected to an output shaft of the reciprocating motor, a rack is meshed outside the gear, and the rack is fixedly connected to the other side of the inner cavity of the protective cover. A guide mechanism is arranged in the rack; through the protective cover, the display screen body, the reciprocating motor, the gear, the rack, the guide mechanism, the fixing block, the guide rod, the guide wheel and the cleaning plate, the LED display screen can be better cleaned, the problem that a large amount of dust is difficult to clean in the LED display screen in the long-time use process of most LED display screens is solved, and the service life of the LED display screen is prolonged.