Hydraulic clamp holder

The utility model discloses a hydraulic clamp holder which comprises a bearing base, a hydraulic cylinder is arranged on one side of the surface of the bearing base, a middle plate body is arranged in the middle of the surface of the bearing base, fork-shaped hinge joints are formed at the two side ends of the middle plate body respectively, clamping arms are arranged on the fork-shaped hinge joints in a hinged mode, and the front portions of the clamping arms are bent inwards to form clamping head portions. Two connecting rings are symmetrically installed on the two sides of the other side of the surface of the bearing base, protruding ring lug parts are arranged on the outer sides of the front portions of the clamping arms in an outward protruding mode, and springs are arranged between the protruding ring lug parts and the connecting rings. Upper and lower flanges are arranged on the outer sides of the middle rear parts of the clamping arms, a channel is formed between the two flanges, a roller is movably a