Abstract: This research studied the effects of time-frequency domain induced polarization applied on a chromium pollution simulation site survey. Combined with the least squares inversion algorithm, resistivity, polarizability and phase angle can be measured by time-frequency domain IP measurements to research the phenomenon of various parameters on chromium contamination of low resistivity anomaly area and concentration differences of chromium (using w as the abbreviation) pollution within low frequency ranges (2-4, 2-2, 2⁰,2²,2⁴ Hz). Resistivity and polarization decreased fast as w (chromium) increased. Resistivity decreased from 80 Ω·m to 50 Ω·m or less and polarizability was reduced from 3.0%-3.8% to 0.6%-2.2%. At different frequencies, the phase angle reflected differently in water content and w(chromium). Experimental data showed that as the supply frequency increased from 2-4 Hz to 2⁴ Hz, the measured phase angle values were more even. However, after the data were processed through the least squares inversion, the phase angle was reduced from 6.27° to 1.75°. The results show that the pure time-domain parameters (resistivity and polarizability) are difficult to distinguish the low-resistivity anomaly caused by moisture content or concentration differences of chromium. However, if supply frequency is within the range of 2-2-2⁰ Hz, frequency-domain parameters (phase angle) can distinguish the different concentrations of chromium contamination, which causes low resistivity anomaly.