Abstract: To meet the technical requirements of lightning strike point location of transmission line based on OPGW polarization state signal,based on the characteristics of polarization state abrupt signal generated by lightning strike OPGW,the peak detection method and Hilbert-Huang transform method are simulated by Matlab. A positioning method based on wavelet transform modulus maxima is proposed. Through simulation analysis,the advantages and disadvantages of the three algorithms are compared. The results show that the wavelet transform has the best effect and can control the lightning strike positioning error to the order of meters.