Aiming at the problem that the trajectory of hypersonic targets in near space is interrupted due to the plasma sheath,a target trajectory detection and correlation algorithm under the condition of large time-space difference is proposed in the three-dimensional space.Multiple measurement points are transformed into the radial distance-time plane through Hough transform for non-coherent accumulation,and a low threshold is set to extract sub-tracks.According to the multi-information fusion of the time,speed,and azimuth between the sub-tracks,the sub-tracks belonging to the same real track are associated and the final track is output.The simulation results show that the algorithm has the ability of detection and correlation for multiple hypersonic targets interrupted track,which is of certain engineering practical significance.