The invention relates to a large-diameter steel strand compression type anchorage device comprising a large-diameter steel strand compression type anchorage device. The device is characterized in that: the device comprises a steel strand. A taper sleeve is wedged between a central steel wire and an outer-layer steel wire at one end of the steel strand. One end of the steel strand is provided with an irregular-shaped steel wire bushing. The irregular-shaped steel wire bushing is formed by wound irregular-shaped steel wires with cross sections shaped as equilateral triangles. A cylindrical compressing sleeve is arranged outside the irregular-shaped steel wire bushing. The outer wall of one end of the compressing sleeve is in a cone shape, and the inner wall of the other end of the compressing sleeve is in a cone shape. The steel strand provided with the taper sleeve, the irregular-shaped steel wire bushing and the compressing sleeve are compressed by using a compressing mold, and are combined into an integral whole. With the taper sleeve wedged between the central steel wire and the outer-layer steel wire, the end of the steel strand is expanded, such that the compression forces among the steel wire layers are increased, and a wire drawing phenomenon of the steel wire strand in tension can be effectively prevented. Therefore, the holding force upon the steel strand is increased, and the anchorage performance is improved. The anchorage device can be widely applied in the field of constructions.