Based on Impulse Ground Penetrating Radar(GPR) antenna theory, and according to the requirement of concrete structure detection, This thesis designs a kind of dual-polarized multi-antennas array. The designed antenna array possesses 0.75~2.25GHz frequency bandwidth and good direction. The double polarization enables deeper surveying, and enhances the efficiency of detection. The designed antenna array is successfully applied to three imaging GPR project. The design method is significant for project quality inspection and provides effective support for the design of 3D GPR systems.