Treatment device for lithium containing slag yard

The invention discloses a treatment device for a lithium containing slag yard. The treatment device comprises a stone cement retaining wall, an impermeable layer, percolate pipes, a percolate collection ditch, and a percolate collection pool, a pH regulating pool, a slow mixing pool, a inclined pipe settling pool and a clean water pool which are arranged in sequence; the stone cement retaining wall is arranged around the lithium containing slag yard and is deep below the ground level; the impermeable layer is arranged on the upper surface of the lithium containing slag yard; a plurality of percolate pipes are arranged on the overground part of the stone cement retaining wall at intervals; the percolate collection ditch is arranged below the percolate pipes; the percolate collection pool isused for collecting slag yard percolate flowing from the percolate collection ditch; the slow mixing pool is used for flocculating slag yard percolate treated by the pH regulating pool; and the inclined pipe settling pool is