The invention discloses a safety display device for a computer; the safety display device comprises a base, a lifting frame and a display screen; the lifting frame is fixed to the base and comprises a motor, a screw, a cross beam and two columns; the two columns are fixedly welded to the left and right of the base respectively; two ends of the cross beam are fixedly connected to the top ends of the two columns respectively; the motor is fixed to the rear middle of the base; the output end of the motor is fixed to the screw through a coupling; the top end of the screw is rotationally connected to the cross beam through a bearing; a connection seat is fixedly connected to the rear of the display screen; two ends of the connection seat are provided with slide holes matching with the columns; the center of the connection seat is provided with a screw hole matching with the screw; the connection seat is slidably connected to the lifting frame. The safety display device allows the height of the display screen to be adjusted according to a user's height, can provide a reminder for the user about surrounding light, is convenient to use, and is good for the user's health.