The invention discloses a numerical controlled lathe with automatic feeding and clamping functions. The numerical controlled lathe comprises a lathe body and a workbench, and further comprises an automatic feeding device, wherein a three-jaw chuck is arranged on the workbench; an inserting tube capable of freely rotating is arranged on the workbench and is in drive connection with a first motor; the three-jaw chuck is coaxially fixed at the tail end of the inserting tube; and the automatic feeding device is used for automatically hoisting and inserting a blank into the three-jaw chuck. In order to overcome defects in the prior art, the numerical controlled lathe with automatic feeding and clamping functions is provided; by the adoption of the numerical controlled lathe provided by the invention, a bar can be automatically hoisted; meanwhile, the hoisted bar can be quickly positioned, clamped and pushed to the three-jaw chuck; and accordingly, the labor amount of workers can be greatlyreduced and the production efficiency can be improved.