The present invention relates to a pontoon blade structure for a waterwheel, which mainly comprises a waterwheel body, at least one driving component disposed on the waterwheel body, a floating component connected to the driving component, and at least one defined on the inner side of each floating component. An inner portion, at least one outer side defined on an outer side of each of the floating elements, and at least one diffusing portion defined at a front end of each of the floating elements, and at least one flow guiding portion defined at a rear end of each of the floating elements； thus, the user The waterwheel body can be disposed in the water, and the driving component drives the floating component to rotate. When the floating component rotates, the diffusing portion can impact the water flow, and the water flows to one side of the outer side, and the length of the outer portion is greater than the length of the inner portion. The law of white effort makes the pressure of the inner part larger than the pressure of the outer part, and raises the water flow at the bottom of the water body to achieve uniform upper and lower dissolved oxygen and wave diffusion effect.本新型為有關一種水車之浮筒葉片結構，主要包括一水車本體、至少一設於該水車本體上之驅動組件、複數連接於該驅動組件上之漂浮元件、至少一界定於各該漂浮元件內側之內側部、至少一界定於各該漂浮元件外側之外側部、及至少一界定於各該漂浮元件前端之擴散部、及至少一界定於各該漂浮元件後端之導流部；如此，使用者可將水車本體設置於水中，由驅動組件帶動漂浮元件旋轉，當漂浮元件旋轉時，擴散部可撞擊水流，使水流往外側部之一側擴散，且外側部之長度大於內側部之長度，藉由白努力定律使內側部之壓力大於外側部之壓力，並使水體底部水流上昇，而達到上、下均勻溶氧，及波浪擴散的效果。
