Abstract: This paper summarized that the main methods of implementing continuous wavelet transform were Timedomain method and Frequency-domain method in analog integrated circuit and VLSI integrated circuit.Considering that the design of band-pass filters in Frequency-domain method is difficult to implement,this paper proposed the means of using Taylor-series to spread the wavelet function.It could obtain the function approximation of the wavelet function.Then this paper raised the method of using Taylor approximation to build the system function model of continuous wavelet transform.The feasibility of this method is validated taking DOG wavelet as an example.