Semi-submersible crane barge's hull

The invention relates to a ship form for a semi-submersible type hoisting pipe-laying ship. A ship body comprises an upper platform, a plurality of upright columns and two lower floaters, wherein the upright columns are fixed at the two sides under the upper platform and are arrayed in parallel; the lower floaters are fixed at two sides, are arrayed in parallel and are connected to the upright columns; and a crane is fixed on the tail part of the upper platform. The ship form is characterized in that a centrum structure expanding outwards from bottom to top is formed by the joints of the upper parts of the upright columns on the stem and the upper platform; the outer sides of the lower edges of the upright columns are matched with the deck molded lines of the lower floaters; the upper sides of the upper edges of the upright columns are aligned with the side boundaries of the upper platform; the joints between the bottoms of the upright columns and the lower floaters are in bulbous bow arch-shaped natural transition; and after being connected in such a manner, the ship form of the stem is of a streamline structure. The ship form for the semi-submersible type hoisting pipe-laying ship can be used for maximally reducing the water resistance and improving the routing speed of the pipe-laying ship under the condition of ensuring the structural strength and buoyancy of the ship body.