Simulation Model Validation is one of the key content in modeling and simulation VV&A. The methods of simulation model validation include time domain, frequency domain and time - frequency analyses. Though the methods of time domain and frequency domain are used widely, the analytic means is considered single. However the methods of time - frequency analyses have particular advantage. The application of wavelet transform has been involved in many fields in recent years, for example, signal processing, pattern recognition and fault diagnosis etc. The paper attempted to apply wavelet transform to simulation model validation. The basic theory and property of multi-resolution analysis on wavelet transform are applied, based on the idea that the signal characteristic is described by using the wavelet transform coefficients. On the basis of multi- scale decomposition of wavelet transform, the output sequences of the simulation model and real system are divided into low frequency and high frequency parts，and the consistence test method based on the discrete wavelet transform coefficients is built according to their respective characteristics. The application example is given and the validity of the method proved.