Optical element anti-drop positioning structure

The invention discloses an optical element anti-drop positioning structure, and belongs to the technical field of optical elements, the optical element anti-drop positioning structure comprises a positioning base, the surface of the positioning base is provided with a mounting hole, the top end of the positioning base is fixedly connected with a lifting box, and one end of the lifting box is provided with a rotating assembly; the other end of the rotating assembly penetrates through the lifting box and is provided with a screw rod, the outer surface of the screw rod is in threaded connection with a lifting seat, the top end of the lifting seat is fixedly connected with a supporting column, the top end of the supporting column penetrates through the lifting box and is fixedly connected with a positioning seat, and a positioning groove is formed in the surface of the positioning seat; and an adjusting assembly used for adjusting the positioning distance is arranged in an inner cavity of the positioning groove,