In this work dynamics of the of liquid binary, alloy Li0.6Pb0.40 have been studied at the melting temperature by considering the system of alloy as an assembly of effective atoms. Norm conserving pseudopotentials have been calculated using the first principle approach. Caluclations performed for LiPb alloy use standard pseudopotential theory, which is second-order perturbation and includes dielectric screening as well. Velocity Autocorrelation function, Phonnon dispersion, and power spectrum have been calculated. The calculated results are in good agreement with experimental results.