Sanshandao Gold Mine is adjacent to the Bohai Sea.Influenced by seawater intrusion,it has abundant groundwater and poor water quality.In order to ensure the safety of mining workface,it is necessary to use the transient electromagnetic method to detect the distribution of water storage in rock mass of roadways.The basic principle and working mechanism of the transient electromagnetic method were introduced.According to the detection in the deep roadway rock mass in Sanshandao Gold Mine with the method,the probable waterrich areas are the bottom of -765 m level,the bottom of -780 m level,the right side of -780 m level and the bottom of -870 m level.The transient electromagmetic method can accurately locate the water-rich area and provide effective technical basis for mine safety production.