The invention discloses a wave energy propulsion system on water, which relates to the fields of ships and marine engineering, unmanned ships and propellers, and comprises: a water bag, the water bag is a thin shell structure with deformability, and the top is provided with auxiliary extrusion The pressure plate of the water bag has an inlet valve at the front end and an outlet valve at the rear end; an underwater auxiliary propulsion mechanism, the underwater auxiliary propulsion mechanism is arranged vertically below the water bag; a connecting rod, the connecting rod One end is connected with the pressure plate of the water bag, and the other end is connected with the underwater auxiliary propulsion mechanism. The new water wave energy propulsion system provided by the present invention continuously absorbs and sprays water in the waves, so that the water wave energy propulsion system can use the abundant wave energy on the sea to continue to propel, is not easily affected by weather and geographical location, and is clean and free Pollution. The water wave energy propulsion system can be applied to marine unmanned equipment such as unmanned ships and wave gliders, as a propeller for marine equipment.