High-altitude object throwing detection early warning device

The invention relates to the technical field of security and protection monitoring, in particular to a high-altitude throwing detection early warning device which comprises a supporting frame, an early warning box, a protection box, a camera and a cleaning assembly, and a glass plate is arranged at the top end of the protection box; the cleaning assembly comprises a driving lead screw, a cleaning rod and a flow guide groove, the driving lead screw is arranged at the top end of the protection box, the flow guide groove is formed in the bottom of the protection box, and the cleaning rod is movably connected with the output end of the driving lead screw, located between the driving lead screw and the flow guide groove and located above the glass plate; the protection box wraps the camera, the camera monitors through the glass plate, the cleaning rod is driven by the driving lead screw to move horizontally, and the cleaning rod makes contact with the glass plate, so that stains or rainwater on the surface of the