Abstract:Forest fires threaten forest safety, leading to loss of life, property and environment. Dynamically simulating forest fires has important theoretical and practical significance for predicting forest fire development trends, reducing forest fire hazards, and scientifically carrying out forest fire extinguishing work. In order to display the forest fire three-dimensional visualization more visually and intuitively, the three-dimensional visualization of GIS and the cellular automaton simulation function are combined to simulate the forest fire spread, and with the help of the combined model of Mao Xianmin and Wang Zhengfei, the cell state transition rule function is defined, Calculate the spread velocity component of the central combustion cell unit in the direction of 8 neighborhoods. Finally, taking Wenquan Town, Anning City, Yunnan Province as the case area, for the "3.29" fire in Yunnan Province, the terrain, weather, vegetation and other data of Wenquan Town were selected to simulate "3.29" The process of fire spread is of great guiding significance in real-time dynamic monitoring of forest fires.