The neutron capture cross section of 232Th66232Th(n,γ)197Au(n,γ) has been measured with the time-of-flight technique in the energy range from 10 to 200 keV at the back-streaming white neutron beam-line (Back-n) of China Spallation Neutron Source (CSNS). The pulse height weighting technique (PHWT) was applied with four C232Th66232Th(n,γ)197Au(n,γ)D232Th66232Th(n,γ)197Au(n,γ) liquid scintillators to measure the prompt gamma-ray energy release following neutron capture. The measurement data, corrected with the PHWT, have been normalized to the saturated resonances at 21.8 eV. The background was determined by a lead sample measurement and detailed Monte Carlo simulations. The 232Th66232Th(n,γ)197Au(n,γ) average cross sections have been determined relative to the 232Th66232Th(n,γ)197Au(n,γ) reaction cross sections. The results are consistent with the evaluation values of CENDL-3.2 and JENDL-5. The total uncertainties, including the PHWT, normalization, background subtraction, corrections, and relative measurement, are in the range of 4.5–4.8%.