Rotation stopping structure of broach mechanism, electric spindle and machine tool

The utility model discloses a rotation stopping structure of a broach mechanism, an electric spindle and a machine tool, and the rotation stopping structure comprises a shaft core which is provided with a shaft core inner hole extending from the near end to the far end along the axis direction; the pull rod assembly is arranged in an inner hole of the shaft core and comprises a pull rod and a spring, the spring extends in the axis direction and is used for providing acting force for resetting of the pull rod, one end of the spring abuts against the pull rod, and the other end of the spring abuts against the shaft core; the shaft end gland is connected to the near end of the shaft core, and a via hole is formed in the shaft end gland; wherein the pull rod is provided with a pull rod neck which penetrates through the through hole and extends outwards, the pull rod neck is provided with a first floating guide groove extending in the axis direction, the shaft end gland is provided with a first ball mounting hole