Analyzing from the data of historical temperature to decide the situation of bugs or aging of submarine cable is a critical issue in practical situation.To solve these problems

Empirical Mode Decomposition（EMD）is used toextract the time-frequency characteristics of historical temperature of the submarine cable.Then

the similarity of the frequency characteristics of the submarine cable is examined via matrix calculation at different positions.Finally

the position of the problematical marine cable will be located through the analysis of the abnormality of the similarity.The experimental result shows that the similarities between the positions of problematical submarine cable are bounded to less than the regular one.Therefore

the position of the problematical marine cable can be accurately located.