1.Strong digging ability: capable of digging hard materials underwater, digging materials with a large proportion of river pebbles, and digging at a large depth. 2.Wide applicability: It can operate in different water bodies such as rivers, lakes, and seas, excavating materials such as sand, stone, clay, silt, and other sediments. 3.Good flexibility: occupies a small amount of water, can be self propelled, and has strong mobility. 4.High efficiency: able to quickly mine various attribute materials, improving work efficiency.