The utility model relates to a deepwater magnetic induction turbine universal flow velocity meter, which is characterized by comprising a flow velocity meter fixing bracket, a fixed steering shaft arranged on the fixing bracket and a pressure-resistant cabin arranged at the top of the fixed steering shaft, wherein the pressure-resistant cabin is connected with a horizontally-steering connector through a steering bearing, one end of the horizontally-steering connector is connected with a flow-guide tail wing and the other end thereof is connected with a rotating shaft cabin, a turbine rotating shaft is arranged inside the rotating shaft cabin, one end of the turbine rotating shaft extends outside the rotating shaft cabin and then is connected with a turbine, a magnetic pole is arranged at the other end of the turbine rotating shaft, a magnetic reed switch is arranged inside the pressure-resistant cabin and in the position corresponding to the magnetic pole, and the magnetic reed switch is connected with a flow velocity controller through a twin-core watertight pressure-proof cable. The deepwater magnetic induction turbine universal flow velocity meter has a simple and smart structure design, is excellent in pressure resistance and leak tightness, and can turn freely to meet the needs for long-term detection of the velocity of the deepwater flow. Therefore, the deepwater magnetic induction turbine universal flow velocity meter can be widely applied to the flow velocity detection of multipoint ocean currents of the underwater oil transmission pipeline in the deep-sea petroleum drilling system.