Abstract: Method based on digital signal processing in particle detectors signal processing applications become increasingly widespread.In the study of particle detectors based on digital signal processing,the correct accurate system modeling is the important part. MATLAB Simulink environment particle detection system behavioral models,including the part of the detector noise,analog front end,an analog-to -digital converter and digital filtering.Implemented based on the model of a multi -channel particle detection circuit simulation analysis of the output waveform of the multi -channel particle detection system and the corresponding energy spectrum RAM, verify the correctness and accuracy of the model.