Automatic blasting flying stone prevention device

The utility model discloses an automatic blasting flying stone prevention device, relates to the technical field of blasting flying stone prevention, solves the problems that time and labor are wasted and operation is troublesome when a protective net is erected and dismantled manually, and comprises a foundation pit support and a protective frame, and a vertical screw rod is rotationally installed on one side of the foundation pit support; and a first motor used for driving the vertical screw rod to rotate is fixedly installed at the position, located below the vertical screw rod, of the foundation pit support, the surface of the vertical screw rod is in threaded connection with a connecting base, a supporting rod is hinged to one side of the connecting base, a winding drum is rotationally installed at one end of the protection frame, and a protection net is wound around the surface of the winding drum. Through the arrangement of the protection frame, the vertical screw rod, the first motor, the connecting b