Ear-nose-throat operation microscope supporting arm device

The invention discloses an ear-nose-throat operation microscope supporting arm device which comprises a base, a support is installed on the top of the base, a first sliding groove is formed in one side of a supporting column in the vertical direction, a first sliding block is arranged in the first sliding groove in a sliding mode and can slide in the first sliding groove, and meanwhile a second sliding block can slide in a second sliding groove. The height of the lens part of the operating microscope is adjusted, after height adjustment is completed, second sliding blocks are fixed in corresponding fixing grooves, the height of the lens part of the operating microscope can be fixed, and a U-shaped block and a mounting block can be rotationally connected through cooperation of a rotating shaft and a rotating hole; and after the angle adjustment is finished, the first fixing ring is pushed to enable the first clamping block on one side of the first fixing ring to be connected with the second clamping block on o