High-precision self-locking turning tool height adjusting mechanism

The invention discloses a high-precision self-locking turning tool height adjusting mechanism, which comprises an I-shaped fixing seat, a turning tool, a hydraulic lifting set, a hydraulic driving assembly, a sliding rod, a probe rod and a proximity switch. The fixing seat is provided with a fastening bolt which is located above the turning tool; the turning tool is arranged at the output end of the hydraulic lifting set which is used for enabling the turning tool to ascend and descend; the hydraulic driving assembly is used for driving the output end of the hydraulic lifting set to ascend anddescend; the sliding rod is slidably connected into the fixing seat, and the end, close to the turning tool, of the sliding rod is hinged to the probe rod; and the proximity switch is fixed to the upper end of the probe rod. The hydraulic driving assembly is arranged to drive the output end of the hydraulic lifting set to ascend and descend, and then by cooperating with the detecting function ofthe proximity switch, the