The invention discloses a sea operation fishing boat. The sea operation fishing boat comprises a boat bottom, a boat body, an engine, a blade shifting machine and safety devices. The boat body is arranged on the upper portion of a boat bottom plate and comprises buoys, supporting frames and a connection disc. The connection disc is fixed to one end of a deck, the buoys are arranged on one side of the connection disc, and the multiple sets of supporting frames are disposed on one sides of the buoys. Round pipes are disposed in the centers of the supporting frames, the supporting frames are connected through connecting shafts, and gears I are disposed at the two ends of each connecting shaft. The safety devices are disposed on the connecting shafts. Each safety device comprises a cabin, a cabin door, a cabin bottom plate, a limiting pin bolt, a sleeve, a spring and a fastening rack. The engine is arranged between the two supporting frames on one side of the connection disc. The blade shifting machine comprises a transmission shaft, blades, a flow guide plate, a control rod, a unit and a unit support. The sea operation fishing boat can keep the cabins balanced in a poor environment, harm to personal safety of crew due to boat swinging and even side-turning over is avoided, the stability performance is high, and the safety and reliability are achieved.