Abstract: The ultra-high density resistivity method was applied to detect the water level of tailing reservoirBased on this，it is proposed that the water lever of tailing reservoir is determined according to the actual changing rate of electronic resistivityThen the water level obtained is compared with the actual result by the field drillingThe result shows that the detected result is basically in line with the actual water level measured through the field drilling，which provides a new method for the water level measurement of tailing reservoirs.

Key words: Ultra-high density resistivity method, Tailings reservoir, Water level, Detection