The invention relates to a water transportation system of steel pipes. The water transportation system comprises float bowls, steel plates, tracks, a trolley and a dragging system, wherein the steel plates are laid on the float bowls, the tracks are spliced on the steel plates, and the trolley is dragged by the dragging system to operate on the tracks. Compared with the prior art, the water transportation system disclosed by the invention has the advantages of flexible structure, low cost and the like.