Up-down clamping type spherical workpiece fixing device

The invention relates to an up-down clamping type spherical workpiece fixing device. The device comprises a base, an upper pressing seat and a supporting rod connected with the base and the upper pressing seat, wherein the bottom of the supporting rod is fixedly connected with the base; one end of the upper pressing seat is provided with a sliding ring; the sliding ring is arranged on the supporting rod in a sleeving mode; a plurality of limiting threaded holes are formed in the supporting rod; a limiting bolt is screwed in one limiting threaded hole; the base is provided with a lower arc-shaped groove; the upper pressing seat is provided with an upper arc-shaped groove; and the opening of the upper arc-shaped groove faces the opening of the lower arc-shaped groove. According to the up-down clamping type spherical workpiece fixing device, when the device is used, a spherical workpiece is placed in the lower arc-shaped groove; then the sliding ring of the upper pressing seat slides down along the supporting ro