Quick positioning device for CNC (computer numerical control) machining center clamp

The utility model discloses a quick positioning device for a CNC (computer numerical control) machining center fixture, relates to the related field of numerical control machining, and aims to solve the problem that the conventional quick positioning device for the CNC machining center fixture is not stable enough in clamping. Clamping plates are arranged on the front side and the rear side of the upper end of the interior of the mounting groove, sliding plates are connected to the lower ends of the two clamping plates, tooth parts are fixed to the lower ends of the two sliding plates, gears are connected to the lower ends of the two tooth parts in a meshed mode, and gear shafts are connected to the right ends of the two gears; the right ends of the two gear shafts penetrate through the mounting plate and are connected with first bevel gears, a second supporting plate is fixed to the lower side of the right end of the exterior of the mounting plate, a second motor is arranged on the front side of the upper en