Numerical control lathe fixture

The utility model relates to the technical field of numerical control lathes, and discloses a numerical control lathe fixture which comprises a three-jaw chuck, the three-jaw chuck comprises an upper chuck body, a lower chuck body, three rotating blocks and three clamping blocks, the three rotating blocks are arranged between the upper chuck body and the lower chuck body, three moving grooves are formed in the top wall of the upper chuck body, and the three clamping blocks are arranged in the moving grooves. The three clamping blocks are installed in the three moving grooves correspondingly, a buffering mechanism is installed between every two adjacent clamping blocks, when the clamping blocks of the three-jaw chuck are gradually tightened inwards, the buffering mechanisms can gradually tighten the opening, when the three-jaw chuck loosens limitation on parts, the buffering mechanisms can be gradually opened, and therefore the parts can be clamped in the three moving grooves. And machined small parts can be c