However, the signal interference of optical fibercommunication laser interface is always a difficultproblem in optical fiber communication system. Digitalfiltering technology is used in the anti-interferenceauxiliary communication process in this field. Particularfrequency in digital filtering technique is the operation ofsignal frequency filtering, and also is an importantmeasure to restrain and prevent interference. In view oftheopticalfibercommunicationinterfacelaserinterference signal filtering problem, this paper designs alaser interference signal filtering method based on digitalfiltering technology of optical fiber communicationinterface. Before the noise reduction, this methodprocesses the noise in the signal to improve thecharacteristics of the signal. On this basis, the signal ofnoise reduction is further separated by digital filter bank,and the interference signal in the signal is separated torealize the effective filtering of laser interface interferencesignal.