Abstract:As non-destructive testing technologies, ground penetrating radar and high-density resistivity method feature high efficiency, non-contact operation, no damage to structures, high precision, high resolution and low susceptibility to environmental interference compared with traditional detection methods. They have been applied and valued in various fields in recent years, especially widely adopted for hidden danger detection of water facilities. Combined with practical engineering cases, this paper illustrates the application of the two technologies in embankment hidden danger detection, accurately identifies defects inside embankments and analyzes relevant hidden troubles. The research results provide references for subsequent danger elimination and reinforcement schemes, as well as for similar engineering projects.