he dynamic characteristic of the AMECOA380 maintenance hangar in Be i jing capital airport was fieldtested excited by environmental random loads. The test data were analyzed by using the spectrum analysis and the natural frequency and the mode of structure were obtained. Based on a finite element model of th e hangar structure, the parameters of structural dynamic characteristic were cal culated and compared with the measured values. The analysis shows that the test result of fundamental natural frequency agrees well with the finite element calc ulation result as well as the first mode shape respectively.