The invention discloses a novel marine propulsion motor. The novel marine propulsion motor comprises a stator and a rotor. The rotor comprises a rotating shaft support and a rotor iron core; the rotating shaft support comprises a hollow core shaft, a driving-end ring plate and a non-driving-end ring plate, wherein the driving-end ring plate and the non-driving-end ring plate are arranged on the external circumference of the core shaft, a plurality of iron-core bench supports are arranged on the external circumference of the driving-end ring plate and the external circumference of the non-driving-end ring plate, large rib plates are arranged between the core shaft and the iron core bench supports, a plurality of small rib plates are arranged between the inner side of the external circumference of the driving-end ring plate and the inner side of the external circumference of the non-driving-end ring plate, rotor iron core pressing rings are arranged at the two ends of the iron core bench supports respectively, and the rotor iron core is fixed between the two rotor iron core pressing rings. According to the novel marine propulsion motor, technology manufacturing of the rotating shaft is simple, the production cost is reduced, and the manufacturing period is shortened; meanwhile, the quality and the rotational inertia of the motor are reduced, and the torque density of the motor is increased.