Tool rest adjusting mechanism of precision machine tool

The utility model belongs to the technical field of precision machine tool knife rests, and particularly relates to a precision machine tool knife rest adjusting mechanism which comprises a bottom plate, an adjusting assembly is installed on the bottom plate, and the adjusting assembly comprises a supporting block, a concave block, a vertical plate, a knife, a baffle, a connecting rod, an extension rod and a compression spring. The bottom plate is fixedly connected with the supporting block through a fixing block, the supporting block is rotationally connected with the concave block through a rotating shaft, and the end, away from the supporting block, of the concave block is fixedly connected with the vertical plate. The tool rest can be rotated and adjusted to the other tool to cut a workpiece, the working efficiency is improved, the fixing assembly is additionally arranged on the mechanism, when the abraded tool is replaced, the two tools can be replaced and fixed at the same time, and the efficiency of th