Abstract: Matched field processing(MFP) is widely used for sound source localization and acoustic parameter inversion of marine environment in recent years.Depending on the convergence zone phenomenon in deep-sea channel,the paper proposes a method of sound source localization based on matched processing of the sound intensity in deep-sea con-vergence zone.This method is called ’matched convergence intensity processing(MCIP)’,which can just rely on a single hydrophone to estimate the distance and depth of the sound source in the case where the source and the receiver are both in the range of convergence zone.The actual intensity can be measured by phase compensation to the signal received by hydrophone.Accordingly the source location can be determined by searching the peak value of the correlation coeffi-cients of the actual sound intensity and the sound intensity in the convergence zone of the copy field.This method is verified by numerical simulation and its applicability in the case of marine environmental mismatch is analyzed.