The invention discloses a screen safety protection device and method of a movable-type concrete jetting manipulator. The screen safety protection device comprises a man-machine interaction unit, a screen opening detection device unit, a control unit and a signal output unit. According to the screen safety protection device, on the basis of an output signal of an approaching switch sensor, the perpendicular distance between the signal face of the approaching switch sensor and an approaching switch induction plate is judged, so that the opening/closing state of a screen is judged, and a corresponding screen safety protection control signal is output by combining a control instruction of the man-machine interaction unit; and meanwhile the state of the signal is displayed in a display screen, and under the situation that the screen safety protection device meets operating of various working conditions is ensured, guarantee is provided for personal safety.