Continuous fiber reinforced polymer matrix composite trusses are widely used in aerospace and aircraft structures due to their excellent mechanical properties and relatively light weight. The vibration characteristics of the structures are the key factors for the application of composite truss. The natural vibration characteristics of composite truss were studied by using the hammering method. Comparative analysis of the truss structure was carried out by using the finite element simulation. Results show that the structural vibration modes and vibration frequency are consistent with the experimental results, which verified the feasibility and accuracy of the hammer excitation on the vibration characteristics of composite truss.