The invention provides a whole tailing depth controllable uniform condensation method, which comprises the following processing steps: concentration of whole tailing ranges from 10 percent to 30 percent; the whole tailing is fed into a buffering agitator tank for homogenization and stabilization; the whole tailing flows into a CH thickener; flocculant with the concentration of 0.5 percent is added to the full tailing; an underflow pump is adopted for loop control to keep the mortar uniform; 12 hours later, the uniform concentration of the mortar reaches 74.5 percent to 76.5 percent; the uniform whole tailing is discharged and fed to an agitator; the uniform whole tailing is mixed with granulated blastfurnace slag, cement and water and becomes cream with the concentration of 78 percent to 82 percent; the cream is fed to a downhole goaf to fill the downhole goaf. The invention has the remarkable advantages of simple process flow, high concentration efficiency, small dissipation of energy and stable concentration of the whole tailing.