The invention relates to a method for producing a hot-rolled steel coil for shipbuilding, which comprises the following steps of: 1) designing components, pretreating molten iron, smelting in a converter, switching nitrogen and argon, and tapping to obtain molten steel; 2) performing continuous casting on the molten steel to obtain a plate blank, wherein the content of the molten steel in a continuously cast intermediate ladle is controlled to be between 8 and 15t and the liquid level is controlled to be between 200 and 350mm when the intermediate ladle is not poured; and pouring is protected in the whole process, and the insertion depth of a long nozzle is between 300 and 400mm; 3) heating the plate blank; and 4) rolling and curling the heated plate blank. The content of C and Mn is greatly reduced through niobium microalloying by a thermo-mechanical controlled process-relaxed precipitation control (TMCP-RPC) rolling process, and production cost is reduced; the obtained grade D36 hot-rolled steel coil for shipbuilding has high plasticity and toughness, and the elongation of the hot-rolled steel coil is improved by over 8 percent; meanwhile, the welding performance of the material is improved, and the high surface quality of a continuously cast blank is ensured.