Abstract: Due to the long persistent time of the energy of guided waves(including Love and Rayleigh waves) going through the wave guid,the structure parameters the wave brought are more interesting.The paper focuses on Love waves based on F-K method.After calculating the dispersion curve and having got the synthesis records of Love guided waves at a given frequency,having been transforming the synthesis records,we can get the velocity parameters of the wave guide through analyzing.The results are consistent with the parameters we gave before.It is indicated that the F-K method can be used for dispersion analysis of guided wave.