According to the special feature of the burning process of a single carbon particle under forced convection conditions (Re < 170), a simplified calculation model is presented in this paper. Based on this model, a numerical simulation of the burning process for the carbon particle has been conducted to obtain the burning rates of the carbon particle under different conditions as well as the concentration and temperature distributions within the boundary layer of the carbon particle. Good agreement of the calculated results with corresponding experimental data demonstrates that this model is reasonable for the case with Re < 170.