Due to the complex structure of high-rise buildings, the diversity of use functions and other characteristics, resulting in once a high-rise building fire occurs, the number of deaths, injuries, and direct economic losses caused by the number of people is huge. This paper takes the fire incident of the telecommunication building in S city of N province as an example, establishes the fire spread model of high-rise building facade insulation material through Pyrosim software, and constructs its fire spread kinetic model. The linear regression and multi-physics field model are combined to realize the reconstruction of the fire accident scene, so as to realize the accurate simulation and analysis of various parameters in the fire spreading process. It is found that the heat release rate curve of the fire spread of the facade insulation material of the high-rise building is in the form of a double peak, and the first and second peaks appear at about 210s and 840s, respectively, and the heat release rate of the second peak reaches 2.15*106 kW. In the composition of the fire spread, the flame change of the flammable material B3 is the most drastic, and the temperature change is the most rapid. The difference between the simulation results and the measured results is relatively small, and the overall temperature change trend is more consistent with the actual results. By simulating the fire spread process of high-rise building facade insulation materials, it is necessary to strengthen the first mobilization of forces, actively develop flame retardant or non-combustible exterior insulation materials, and multi-point monitoring to enhance the fire rescue initiative when carrying out fire spread control.
