| The forest fire always happens suddenly and is complicated. It is so necessary to apply computer and mathematical modeling to prevent the fire. The plan to put off forest fire is very important and is useful for organization fireman and reduce the lost.In this paper we analyzed the paper publish in the country and abroad, established the plan-generating system based on forest prevent auxiliary direction system. We compared several fire spread model, chose the model fit the forest in Baoding to forecast and analyze the spreading speed of forest fire which made foundation for the establishment of the plan. We also analyzed the drawbacks of nearest way arithmetic in practice, optimized the arithmetic, made it more practically; established the model of the relation between the number of fireman and time to put off the fire under different condition. When we put the data in, the answer of the arithmetic proved to be true and the function was realized by code. |