The current standard method for the determination of sulfur in titanium concentrate is combustion-iodometry. But the analytical procedures of this method are long, which is not suitable for the analysis of large quantities of samples. Meanwhile, the determination range of this method is limited and only suitable for samples with sulfur mass fraction between 0.025% and 0.500%. In order to meet the needs of production and scientific research of titanium concentrate, an analytical method for the determination of sulfur in titanium concentrate by high frequency furnace combustion infrared absorption was established. The test conditions were optimized, including dosage of sample, type and dosage of flux for combustion. The optimum analytical determination conditions were obtained as follows: 0.40g of sample was transferred into a crucible; then 0.5g of tin particles, 0.3g of pure iron particles and 1.3g of tungsten particles were added as flux. The calibration curve of sulfur was prepared sectionally using certified reference materials of titanium concentrate. The determination range of mass fraction of sulfur was 0.0048%-2.76%. The limit of quantification was 0.0006%, which could fully meet the determination results of existing titanium concentrate. The titanium concentrate samples with sulfur mass fraction of 0.0092%-1.51% were determined according to the experimental method. The relative standard deviation (RSD, n=8) of determination results were between 0.33% and 1.8%. The found results were consistent with those obtained by barium sulfate gravimetric method. The spiked recoveries for the low-sulfur samples were between 90% and 105%.