Video-monitoring and intelligent-analysis pre-warning system for limit exceeding of open-cast mining slope angle

The invention discloses a video-monitoring and intelligent-analysis pre-warning system for limit exceeding of an open-cast mining slope angle. The system comprises a horizontal calibration instrumentand a vertical calibration instrument, wherein the horizontal calibration instrument is connected with the vertical calibration instrument and is used for keeping planes of two emitting instruments level and supplying initial level data to a data summarization device, so that the situation that the slight deviation of a detection result is caused because the planes of the two emitting instrumentsare not level is avoided; the vertical calibration instrument is connected with beam emitting instruments and is used for keeping planes of two emitting instruments vertical and supplying initial vertical data to the data summarization device, so that the situation that the slight deviation of a detection result is caused because the planes of the two emitting instruments are not vertical is avoided; and the horizontal cal