Positioning cone for machine tool workbench

The utility model discloses a positioning cone for a machine tool workbench, which is characterized by comprising a cone sleeve, a cone core sleeved in the cone sleeve and a rolling ball body arranged on the cone core, a first rolling ball groove matched with the rolling ball body is arranged on the cone core, a part of the rolling ball body is arranged in the first rolling ball groove, and a second rolling ball groove matched with the rolling ball body is arranged on the cone sleeve. A rolling ball hole allowing the rolling ball to partially pass through is formed in the taper sleeve, a taper seat connected with a machine tool workbench is matched with the taper sleeve, a second rolling ball groove matched with the rolling ball is formed in the taper seat, and the rolling ball is clamped with the second rolling ball groove or separated from the second rolling ball groove under the action of the taper sleeve and the taper seat; by means of the mode, the position of the machine tool workbench can be stabilized