a kind of correlation approach of fractal signals be presented, which applies the principle of multifractal association to carry out wavelet packet association based on fractal feature of the acoustic signals, meanwhile, the introduction of fractal approach can help to analyze the target signals receiving by sensors. The simulation experiment shows two similar signals and through wavelet packet association the wavelet transform coefficients of association signal are obtained which can be contribute to the further research for different acoustic signals to update the signal database characteristics.