The invention relates to a method for producing hot rolled steel coils for ship building. The method comprises the following steps: 1) designing the components, pretreating molten iron, then carrying out converter smelting, carrying out nitrogen/argon changing over and carrying out tapping to obtain molten steel; 2) continuously casting the molten steel to obtain slabs, controlling the weight of the molten steel in the tundish to be 8-15t when casting of the continuous casting tundish is stopped, ensuring the liquid level to be 200-350mm; carrying out protective casting in the whole course and ensuring the insertion depth of the long nozzle to be 300-400mm; 3) heating the slabs; and 4) finally rolling and curling the heated slabs, thus obtaining the hot rolled steel coils. The method has the following beneficial effects: the contents of C and Mn in the grade B steel components are reduced, proper rolling and cooling control processes are adopted, the comprehensive properties of the grade B steel are improved and the grade B hot rolled steel coils with low cost and high properties are produced.