<p>A thermal–hydraulic model was developed to analyze the three-dimensional (3D) temperature field of a graphite-moderated channel-type molten salt reactor (GMC-MSR). This model solves the temperature distribution of both the graphite moderator and fuel salt using a single convection–diffusion equation. Heat transfer at the interface between the fuel salt and graphite was addressed by introducing an additional thermal resistance component at the interface and modifying the anisotropic thermal conductivity of the fuel salt. The mass flow distribution in different flow passages was determined by adjusting the mass flow rate until a uniform pressure drop was achieved across all fuel channels. This thermal–hydraulic model, constructed on COMSOL Multiphysics, was verified by comparing its temperature results with those from the RELAP5 code across two demonstration cases. A steady-state thermal–hydraulic simulation of this model was performed to evaluate the conceptual design of a 2-MW experimental molten salt reactor (2MW-MSR). In addition, detailed discussions of the 3D temperature field, heat flux, and mass flow distribution of the 2MW-MSR were presented. This model allows for a comprehensive 3D thermal–hydraulic analysis of the GMC-MSR. Moreover, it only requires the solution of a single convection–diffusion equation, which makes it invaluable for GMC-MSR design.</p>