Abstract: An LCD screen capable of preventing the phenomenon of blackening an LCD panel includes a frame, an LCD panel installed in the frame, a first translucent insulating panel installed in the frame and on a front side of the LCD panel and separated from the LCD panel by a first distance, an intake fan installed at the bottom of the frame, an exhaust fan installed at the top of the frame and corresponding to the intake fan, a second translucent insulating panel installed on a front side of the first translucent insulating panel and separated from the first translucent insulating panel by a second distance, and two gas flow holes formed at the top and bottom of the frame respectively. The internal temperature of the LCD screen is maintained below the critical value of blackening to prevent the phenomenon of blackening the LCD panel installed inside the LCD screen.