Energy-saving propeller

The invention discloses an energy-saving propeller and belongs to the technical field of ship accessories. The energy-saving propeller comprises a controller, an inner shaft, linear motors, movable blocks, an outer cylinder, first slide rails, first sliders, support rods, first air cylinders, racks, support blocks, clamping plates, first double-end air cylinders, second air cylinders, second sliders, second slide rails, paddles, third slide rails, first electric push rods, first push blocks, bulging plates, second push blocks, second electric push rods, second double-head air cylinders, supports, third sliders, first gears, rotating shafts, a chain, second gears, third electric push rods, gear racks and a motor, wherein one linear motor is mounted on each of the left side and the right side of the inner shaft, the movable blocks are mounted on the linear motors, the outer cylinder is mounted on the movable blocks, one support rod is mounted on each of the left side and the right side in the outer cylinder, th