The invention discloses a turning combined 
machine tool with a retractable tool, belongs to the technical field of 
numerical control machines, and solves the problems that the length of a tool of an existing 
machine tool cannot be flexibly adjusted, the 
machine tool needs to be switched off to replace the tool, the tool replacing process is complex, the tool replacing efficiency is low, and the 
machining efficiency is influenced. The turning combined 
machine tool with the retractable tool is characterized by comprising a 
machine tool body, a workpiece clamp and a 
numerical control tool rest, wherein the 
numerical control tool rest is installed on the 
machine tool body and comprises a transverse guide rail 
assembly, a longitudinal guide rail 
assembly and a tool 
assembly. According to the turning combined machine tool with the retractable tool, a tool body with the retractive function is installed on the numerical control tool rest and matched with a clamp on the workpiece clamp, so thatthe 
machining operations of high-speed rotation, depth-controllable turning and transverse through drilling of a workpiece are realized, the production efficiency is greatly improved, meanwhile, theturning positioning accuracy and the surface turning accuracy are improved, the length of the tool extending out of a tool head shell is effectively controlled, the 
impact on the tool is reduced, theturning efficiency is improved, the service life of the tool is prolonged, and significant losses are avoided.