Dispersion　effect　of　Lamb　wave　will　cause　wave-packets　to　spread　out　in　space　and　time,　making　received　signals　hard　to　be　interpreted.　Though　the　conventional　dispersion　compensation　method　can　restrain　dispersion　effect,　waveform　deformation　still　remains　in　the　compensated　results.　To　eliminate　dispersion　effect　completely,　a　reshaped　excitation　dispersion　compensation　method　is　proposed　in　this　paper.　The　method　compensates　the　dispersed　signal　to　the　same　shape　as　the　original　excitation　by　generating　a　reshaped　excitation　and　then　mapping　the　received　signal　from　time　domain　to　distance　domain.　Simulations　and　experiments　are　conducted　for　the　validation　of　the　waveform　correction　of　the　reshaped　excitation　dispersion　compensation　method.　Applied　in　the　traditional　delay-and-sum　algorithm,　the　new　dispersion　compensation　method　can　effectively　enhance　the　resolution　of　the　damage　imaging.