The simplification of the dynamic model of aviation kerosene oxidation is one of the important problems in numerical simulation of combustion chamber. It plays a decisive role in CFD numerical calculation and for reducing the stiffness of convergence, as well as for introducing chemical reactions to more complex turbulent combustion problems. This study aims to present a two-component surrogate fuel model for chemical reactions. Furthermore, the simplified mechanism of the optimization of the ignition delay time and experimental value is adopted using the direct relation graph method (DRG). As the primary originality for the paper, the eclectic simplified mechanisms with certain precision and fewer components and elementary reactions were concluded. And the simplified mechanism was introduced into FLUENT to simulate the precast evaporation flame of the Bunsen burner, which is a RP-3 fuel. Numerical results are in good agreement with the experimental results. The existing simplified mechanism for the two-component RP-3 aviation kerosene alternative fuel can be applied to the practical engineering problems of the numerical forecast.