The invention provides a moulding bed splicing plate butting tooling for ship sectional assembly phase. The tooling is provided with two screw rods and a lifting platform, wherein the two ends of the lifting platform are respectively provided with a thread sleeve, the two screw rods respectively penetrate through the thread sleeves and are screwed with the thread sleeves, the extending ends of the two screw rods are respectively abutted against the upper end surfaces of a to-be-spliced plate I and a to-be-spliced plate II, the lower end surface of the lifting frame is fixed with a rib plate, one end of a connecting plate is provided with an elbow plate which is tightly abutted against the to-be-spliced plate I and the to-be-spliced plate II, and the other end of the connecting plate is fixed and connected with the rib plate through bolts into a whole. The tooling has the advantages that the detachability effect is realized, the tooling can be reutilized, the additional works of splitting, touchup and grinding are not generated, the cost is effectively reduced, and the working efficiency is improved.