Abstract: The dynamic behaviors of the artillery recoiling partshave an important effect on the measurement accuracy of the artillery launchtest and the evaluation of the artillery performance. In this paper,we determine the optimum responsepoints and driving points of the structure on the basis of the FEA model,then obtain the natural frequencies and modes of the structure with theoptimized model of the experimental modal analysis. The test resultsshow that the FEA analysis can improve the efficiency of theexperimental modal analysis and the dynamic performance of the structurecould be obtained with good accuracy.