In order to deal with the problem of multi-impact sources localizatio n,difficulty of networking and low accuracy of traditional impact source localization system,A impact source method is designe d based on fiber Bragg grating (FBG) sensor network and time reversal focusing imaging technology.The principle of time reversal focusi ng is analyzed in this paper.The monitoring system is established by four FBG sensors,and the narrow band laser edge filter tech nology is used to demodulate signal.The Shannon wavelet transform is used to extract narrow band signal,and the modulus value and velocity are calculated.Multi-impact sources localization is realized by establishing time reversal focusing search model,and the method is verified in impact experiment of the aviation aluminum alloy plate.The results show that this method can effectively localiz e multi-impact sources,and the localization error is less than 1.5cm.A high-accuracy method is provided for multi-impact sources detect ion and localization.