Damping hinge

The invention discloses a damping hinge. The damping hinge is characterized in that a short compressed spring assembly is omitted, a connecting rod mechanism is structurally adjusted and formed by sequentially hinging an adjusting rod, a damping transmission rod and a hinge block, one end of the adjusting rod is hinged to a door frame connecting piece, and the other end of the hinge block is hinged to a long compressed spring base; a damper assembled in a damper box is arranged additionally and installed in an installing through hole in the damping transmission rod, the damper box is installedin a damper box positioning groove in a hinge base, and the damping transmission rod penetrates through the damper box; during assembly, the damper and the damper box are assembled with the damping transmission rod of the connecting rod mechanism, then the connecting rod mechanism and the long compressed spring assembly are installed on the hinge base and then hinged, the door frame connecting piece is hinged to the conn