Numerical control turning tool

The utility model provides a numerical control turning tool. The numerical control turning tool comprises a tool bar, an installation block installed at one end of the tool bar, an installation groove formed in the installation block and used for installing a fixing block, a tightening piece and a tightening assembly, wherein a tool bit is detachably installed on the fixing block, and the tightening piece and the tightening assembly are used for fixing the fixing block into the installation groove. When the numerical control turning tool provided by the utility model is used and the tool bit with the same specification needs to be replaced, the tool bit can be directly detached from the fixed block for replacement. When the tool bits of different specifications need to be replaced, the fixing blocks can be taken out of the mounting grooves only by loosening the pressing assembly and the tightening piece, the fixing blocks and the tool bits of the corresponding models are replaced, tool replacement can be comp