Abstract: For determining the equivalent uniformly distributed live load of high-rise aerial fire engines, they are classified into four types upon the number of rear axles. By using this method to determine the equivalent load of fire exits, the problem of numerous types of high-rise fire trucks can be effectively overcome. The equivalent uniformly distributed load of fire exits is mainly controlled by the number of rear axles and the weight of a single axle of the high-rise aerial fire engine axle. When the depth of soil cover on the basement roof is zero, or when the depth of soil cover is large and the number of rear axles is more than 3, the equivalent uniformly distributed load of high-rise aerial fire engines may exceed the value specified in the current "Load code for the design of building structures" GB 50009−2012 in China. According to the usage conditions of fire engine rescue states, by solving the force balance equations, the minimum value of the overall stability coefficient of the high-rise aerial fire engines is 1.126, and the maximum reaction force of the outrigger legs is half of the total fire engine weight. For determining the equivalent uniformly distributed load of one-way and two-way plates within the field for fire-fighting of high-rise aerial fire engines, the calculation formulas that takes into account the influence of vehicle weight and outrigger leg pad size are proposed. When the depth of the soil cover is small, the equivalent uniformly distribution load of the maximum reaction force of the outrigger legs of the fire engines may be much greater than that of the current provisions of “Load Code for Building Structures” GB 50009−2012. By increasing the size of the outrigger pad appropriately, the equivalent uniformly distributed load of the high-rise aerial fire engine rescue state can be effectively reduced.