Abstract: In order to solve the problem of unstable concentrator production water supply caused by unreasonable process of tailings reservoir backwater system and pipeline current limiting，a concentrator has carried out directional optimization technology research and engineering practice.By optimizing the wa‐ ter supply process of the high-level pool，the“double pump and double road”transformation of the floating ship system is carried out to solve the problem of production water use in the concentrator.After the transfor‐ mation of the project，the double pumps of the floating ship pump are operated in parallel，and the average return water flow is increased by 76.3% compared with that before the transformation，and the self-suffi‐ ciency rate of the production water in the plant is increased to 98.2%.It fills the water gap of the concentra‐ tor，effectively releases the backwater capacity of the floating pump in the tailings pond，and gets rid of the dependence on the mining groundwater. It provides technical reference and engineering demonstration for the efficient operation of the backwater system and the recycling of water resources in similar mines.

Key words: tailings reservoir, backwater system, double pump double road, water resources recycling