The invention discloses an outdoor LED display screen with a cleaning function. The outdoor LED display screen comprises an LED display screen body and a fixing base. A supporting stand column is welded to the fixing base, an aluminum alloy frame is installed at the top end of the supporting stand column, the LED display screen body is installed on the inner side of the aluminum alloy frame, a supporting plate is welded to the top of the aluminum alloy frame, a fan, a case and a cleaning liquid barrel are installed on the supporting plate, a motor is installed in the case, a telescopic pushing rod is installed at the output end of the motor, and a cleaning roller is installed at the end, away from the motor, of the telescopic pushing rod. According to the outdoor LED display screen, a traditional manual cleaning mode is changed; in the cleaning process, the motor pushes the cleaning roller to move vertically on the LED display screen body through the telescopic pushing rod, brushes on the cleaning roller can rapidly clean the LED display screen body, and cleaning is safe and reliable and saves time and labor; besides, the function of rapidly air-drying the cleaned LED display screen body can be achieved.