The invention relates to an industrial pure iron production method which comprises the following production steps of oxygen converter smelting, LF refining, molten steel slag removal, LF refining, RH refining, and casting, wherein in the step of oxygen converter smelting, molten iron containing less than or equal to 0.001% of S is adopted, total iron smelting is carried out, the tapping temperature is controlled at 1670-1690 degrees, an oxygen value is controlled at 600-900ppm, terminal C is controlled below 0.04%, P is controlled below 0.015%, and boiling tapping is carried out; in the step of LF refining, lime and fluorite are adopted for slag making and dephosphorization, after slag removal, aluminium wire sections and lime are added for making reducing slag for desulfurization, and top slag FeO+MnO is controlled below 1.5%. The industrial pure iron production method has the advantages that an oxygen converter adopts molten iron containing ultralow S content for total iron smelting, so that the content of residual elements of steel is effectively controlled; at the terminal of the oxygen converter, high temperature, high oxygen and low carbon boiling tapping is realized, so that the effects of external refining dephosphorization and decarburization are ensured; and by adopting an oxygen converter and external refining smelting technology, the cost of pure iron is relatively low.