Finite element models of reinforced concrete slab impacted by the engine at different speeds were established. Using results of those simulations, material models and related parameters were calibrated. The mesh size effect was also analyzed. A large commercial aircraft at 200m/s impacting to steel concrete nuclear power plant structure is discussed utilizing nonlinear material model, the result of the crash was analyzed compared by rigid and elastic model, regularity of aircraft impact load with different structure stiffness was proposed，and the applicability of the common method --Riera method used in aircraft impact force calculation in the preliminary design of nuclear power plant was discussed.