Submarine optical cable shearer

The invention discloses a submarine optical cable shearer. According to the submarine optical cable shearer, the overall size is small, and the weight in water is low, and does not exceed 10 kg. The submarine optical cable shearer can be carried on small-sized, medium-sized and large-sized ROVs for use, has high shearing capability and can be used for breaking submarine optical cables with the diameter phi of 30 mm. An optical fiber is arranged in the center of a submarine optical cable, the periphery of the optical fiber is protected by a metal armor layer composed of a plurality of 80# high-quality carbon structure steel wires with the diameter phi of 4 mm and the tensile strength of 1080 MPa, and the outermost layer is wrapped by an asphalt-impregnated hemp rope with the thickness of 8 mm; the shearing speed can reach a microsecond level, and the optical cable maintenance operation efficiency can be greatly improved; and the submarine optical cable shearer is suitable for operation in a shallow sea area of