The invention discloses a high-precision numerical control machining tool comprising a tool base, a spindle box and a tool shell. The spindle box is located at the upper end of the tool base. The toolshell is located on the rear side of the upper end of the tool base. A workbench is fixedly installed on the other side of the upper end of the tool base. A three-jaw chuck is arranged on one side ofthe upper end of the spindle box. A Z-direction sliding rail is fixedly installed at the upper end of the workbench. The high-precision numerical control machining tool is provided with a telescopicrod, a buffer gasket and an altimeter, a control panel can be controlled telescopically, the distance from the control panel to the shell can be adjusted conveniently, the control panel can be used conveniently, a to-be-machined workpiece can be clamped in a protective mode, harm caused by workpiece extrusion in the clamping process is avoided, height measurement can be conducted on the clamping process of a cutter, the standard clamping height is met, numerical control machining precision is improved, certain practicability is achieved, and better use prospects are brought.