The invention relates to a submarine pipe coating clearing device comprising a clamping mechanism, a rotating frame and high-pressure spray nozzles. The clamping mechanism is used for being clamped to the outer side of a submarine pipe and can move back and forth in the axial direction of the submarine pipe. The rotating frame is arranged on the clamping mechanism and can rotate back and forth around the outer ring of the submarine pipe. The high-pressure spray nozzles are arranged on the rotating frame and are opposite to the outer ring of the submarine pipe so that the high-pressure spray nozzles can conduct spray cutting on the coating on the outer wall face of the submarine pipe when rotating along with the rotating frame. The rotating frame of the submarine pipe coating clearing device can rotate around the outer ring of the submarine pipe, the high-pressure spray nozzles are connected with a high-pressure water pipe through a pipeline, and the high-pressure spray nozzles can conduct cutting clearing on the coating on the circumferential ring of the submarine pipe in the rotating process. Meanwhile, the high-pressure spray nozzles and the rotating frame can move in the axial direction of the submarine along with the clamping mechanism, and therefore omnibearing cutting clearing of the circumferential ring and the axial direction of the submarine pipe is achieved.