102 strong ground motion records within the rupture distance of 100 km during the Wenchuan earthquake were selected to study that whether intensity measures of ground motions could describe the characteristics of near?fault earthquake?induced ground motions. Both time?history curves and response spectrums were performed to study the intensity measures of ground motions and the characteristics of spectrum parameters in different rupture distances.Results showed that the ratio of horizontal and vertical peak ground velocity to acceleration could not represent the intensity measure of near?fault ground motions.Also,the choosing value standard within 1/2?2/3 of ratio of peak acceleration in vertical and horizontal motions ( PVA/PHA ) was not suitable for near?fault motions. In contrast to the horizontal acceleration spectrums, more high frequencies were obtained in vertical spectrums which presented the narrow shape and the smaller characteristic period. With the increasing rupture distances, the average vertical acceleration spectrum attenuated more rapidly. It is recommended that the βmax in code design spectrum should give a reasonable increase for near?fault earthquake?induced ground motions.