The invention relates to an energy-saving control method for treating tailings. The energy-saving control method for treating tailings is characterized by comprising the following steps: concentrating tailings in a concentration basin, settling high-concentration tailings into the bottom, leading low-concentration tailings at the upper part into a low-concentration tailing basin through a connection pipeline, arranging a concentration detector at the upper part position at which the connection pipeline is arranged in the concentration basin, and arranging a valve on the connection pipeline; directly draining the high-concentration tailings to a tailing pond through a mortar pump; when the concentration detected by the concentration detector is higher than a certain threshold value, closing the valve, stopping the leading of the low-concentration tailings into the low-concentration tailing basin until the concentration achieves or is lower than the threshold value, opening the valve, and starting energy-saving and electricity-saving procedures; and mixing the low-concentration tailings in the low-concentration tailing basin with clear water through a clear water pump and delivering to a production area. The energy-saving and electricity-saving procedures not only can save great electricity of the mortar pump, but also can save the usage amount of clear water.