Multi-degree-of-freedom connecting assembly of optical instrument for helmet

The invention relates to the technical field of photoelectric comprehensive observation and aiming, and discloses a multi-degree-of-freedom connecting assembly of an optical instrument for a helmet, the multi-degree-of-freedom connecting assembly comprises a connecting seat, a sliding plate, a moving frame, an overturning sleeve and a connecting frame, the connecting seat is provided with a first connecting unit used for being connected with the helmet, and the sliding plate is connected with the connecting seat through a longitudinal adjusting unit; the moving frame is connected with the sliding plate through a vertical adjusting unit, the overturning sleeve is connected with the moving frame through an overturning unit, the connecting frame is connected with the overturning sleeve through a transverse adjusting unit, and a second connecting unit used for being connected with an optical instrument is arranged on the connecting frame. Rapid clamping and multi-degree-of-freedom adjustment of the optical instru