The Loads of aircraft involved air load、landing load、mass load and so on. Because of the load case is various,how to input different load cases and different component loads and various loads into inferface bulk data with finite element analysis based on NASTRAN Software is pivotal technique. In this paper, according to special code, air load and landing load and mass load on the node force,which are from ninety serious load case in the design of some aircraft,are input BDF file of NASTRAN software. The analyzing and calculating show the method has more distinguished load and more efficient to input load.