Abstract: Aiming at the circumstance that the high resolution range profile(HRRP) sequence acquired by the terminal guidance radar in its search phase was not fully used, we proposed range multi-structure identification method based on HRRP sequence of broadband radar target. Firstly, the method acquired the change HRRP sequence along the line of sight between the target and the terminal guidance radar in the search phase. Then, it obtained the target range structure according to maximum matching rule which acted on the radar cross section(RCS) change trend between different basic geometry and target with corresponding azimuth. Finally, by judging the probability form of structure similarity parameter between the target and basic geometry, it extracted the characteristic and accomplished the identification of the ship targets. The simulation of three kinds of typical target formation and the non-formation ship target's measured data show that the method is effective.