The invention discloses a wavelet processing system which is used for decomposing, processing and reconstructing data and comprises j decomposition modules, a digital signal processing module and j reconstruction modules, and the digital signal processing module is located between the j decomposition modules and the j reconstruction modules; Wherein the data is decomposed into high-pass data and low-pass data through j decomposition modules in sequence, the high-pass data and the low-pass data are transmitted to the digital signal processing module to be processed, and the processed high-passdata and low-pass data are reconstructed into processed output data through j reconstruction modules in sequence. The invention provides a wavelet processing system. data under multi-channel different-level wavelet decomposition is obtained; The method comprises the following steps: firstly, carrying out down-sampling or up-sampling on data of a specific moment and a specific position, fusing thedown-sampling or up-sampling into a data path, responding to the change of a filter, and processing the data of the specific moment and the specific position, thereby integrating the down-sampling orup-sampling into the whole filtering process, and finally achieving the purpose of deleting a data storage structure and a corresponding control circuit in the circuit design process.