[en] As a part of establishing Monte Carlo computation system for the high temperature gas-cooled reactor (HTGR) core analysis, the benchmark calculations for HTGR is carried out using MCNP code. There are many HTGR reactors, but the core of HTR-10 in China is selected as a reference benchmark model. IAEA already published the benchmark problem sets, and this open information plays the guideline to model the HTGR core. This study models the core through the more accurate approach, and deals with the part of core physics benchmark problems proposed for HTR-10 initial core. The results are obtained by MCNP5 code and the remark point for using executing MCNP is figured out