Abstract: The effect of various process factors for producing tire cord steel on inclusion composition was discussed by thermodynamic calculations. Some advice was proposed for controlling inclusion composition, which includes deoxidization with the Si-Mn alloy without aluminum, dissolved aluminum controlled within 1×10^-6~5×10^-6 in mass fraction, using ladle lining without alumina, creasing vacuum degree over 300 Pa and canceling feed Si-Ca line.