The use of underwater excavation bucket hard soil, gravel dredger. Hull was a box, bow equipped with a rotary excavator bucket on a circular orbit plane can be rotated 130 °, the use of retractable landing dredging bucket arm. Bucket dredger generally non-self-propelled. Both sides of the bow have a positioning square pile, about 25 meters, the tail also has a positioning square pile, about 23 meters, with a spud positioning dredging, pile stern position after serving as support recoil purposes. Bucket dredger dredging depth of 2 to 10 meters, the production capacity of 100 to 240 cubic meters per hour.