The utility model discloses an underwater wellhead area cleaning device. The underwater wellhead area cleaning device comprises a mandrel with a central channel, a first shell, a second shell and a rotating assembly, wherein the mandrel is sleeved with the first shell in a rotatable mode relative to the mandrel, the second shell is connected with the first shell, and the rotating assembly is installed in the second shell. The rotating assembly divides the internal space of the second shell into a first cavity and a second cavity which communicate with each other in the axial direction. A nozzle assembly which is distributed at multiple angles and communicates with the second cavity is arranged on the second shell; a central channel in the mandrel is sequentially communicated with the firstchamber and the second chamber to form a fluid channel; when fluid passes through the rotating assembly to the second cavity along the fluid channel, the rotating assembly is driven to rotate, so that the second shell and the first shell are driven to rotate relative to the mandrel, and the fluid is sprayed outwards at multiple angles through the nozzle assembly. The underwater wellhead area cleaning device can be directly connected with a drill rod, the operation cost is reduced, a high-displacement and multi-angle rotary spraying function is provided, and rock debris and cement paste in theunderwater wellhead area are effectively cleaned.