Modal identification of a vibrating system is one of the research hotspots in studying the structural dynamic characteristics of a bridge.The modal of a vibrating system was identified with the help of continuous Morlet wavelet transform by first analyzing the modal parameters of a general damped system with complex modal analytical theory and then using RBF neural network interpolation technique to predict,extend and denoise the vibration signal containing noise.This paper takes Chongqing Dafosi Yangtze Ri...