According to the characteristics of the black box beacon，the design and implementation process of a search and positioning equipment with targeted detection for black boxes are introduced. The black box search and positioning equipment uses the profiling drifting buoy technology，and realizes the regional positioning and distance estimation of the beacon signal of underwater black boxes through the installation of hydrophones. After the target is found，it will automatically float to the water surface and send the location information of the target to the monitoring center by satellite. In this way，the target can be searched and located quickly，the manpower and material resources can be saved，and the precious searching time can be obtained. Through the development of the principle prototype and the related lake validation test，it is shown that this equipment has the preliminary ability of black box detection.
