Wire cutting fixing mechanism capable of improving cutting efficiency

The fixing mechanism comprises a base and an installation block, the installation block is fixedly connected with the top of the base, a through opening is formed in the installation block, a threaded rod is inserted into the inner top of the through opening in a threaded mode, the bottom of the threaded rod is sleeved with a threaded sleeve in a threaded mode, and the threaded sleeve is connected with the threaded rod in a threaded mode. A fixing plate is fixedly connected to the bottom of the threaded sleeve, a rotary knob is fixedly connected to the top of the threaded rod, an arc-shaped clamping rod is rotatably connected to the top of the mounting block through a pin shaft, a plurality of clamping grooves corresponding to the arc-shaped clamping rod are formed in the outer wall of the rotary knob in a surrounding mode, and a bearing plate is fixedly connected to the top of the mounting block through a supporting plate. A sliding rod is slidably inserted into the end, away from the supporting plate, of th