Sensitivity analysis of related parameters, soil and grout volumetric heat capacities, initial soil temperature, borehole vertical length on the estimation of borehole thermal resistance is carriedout by using in-situ thermal response test in this study. The analysis tools used are GPM, SPAN and SPAL. Results of this work indicate that the effects of both soil and grout volumetric heat capacities are small, however, initial soil temperature and borehole length show significant effects on the estimation of borehole thermal resistances. These results are consistent with the previous work of sensitivity analysis on the estimation of thermal conductivity.