Abstract: Applying time reversal algorithm in ground penetrating radar (GPR) multi-target imaging is viewed as a choke point that due to each object's time of energy focusing and intensity of energy focusing are different. In order to realize the time reversal algorithm for GPR multi-target imaging, this paper firstly detects the location of potential target's hyperbola in B-Scan, then we use the window to outline the ‘space-time'position of each potential target,and then translate the ‘space-time'window into the ‘position and depth'window of objective imaging region and employ time reversal imaging for each potential target. According to the fact that the false target does not exist energy focusing,we exploit this characteristic to eliminate false target and make the multi-target imaging come true. The experimental result shows that the multi-target imaging algorithm presented in this paper produces a better effectiveness for multi-target imaging. Because the algorithm only image the potential target window, rather than the entire region, in this way we can greatly improve the efficiency of imaging.