Clamping device of horizontal machining center

The utility model discloses a clamping device of a horizontal machining center, which is characterized in that the front end of a main shaft of the horizontal machining center is provided with a rotary worktable, the rotary worktable is provided with at least four stations, and the rotary axis of the rotary worktable is vertical to the axis of the main shaft; a workpiece is clamped on a station, far away from the main shaft, of the rotary workbench, the rotary workbench drives the workpiece to move to one side of the main shaft to be machined, and the machined workpiece rotates to the bottom and is separated from the rotary workbench. The machined workpiece rotates to the bottom and is separated from the rotary worktable; therefore, chippings generated by processing are easy to fall off; after the air gun blows down, chippings cannot fall on the stations again, so that the clamping precision of the next workpiece is guaranteed, the rotary workbench is provided with a plurality of stations, the workpiece can b