Abstract: The combustion regularity of B₂O₃-Al-C system was investigated and the reaction activation energy of B₂O₃-Al-C system was determined by the equation of wave speed, through which the transformation SHS diagram of the reaction combustion model was established. Through the numerical simulation, the temperature field of the spiral combustion model was obtained. Combined with experimental results, the formation mechanism of the spiral combustion model occurring under the conditions of actual reaction parameters was analyzed.