The invention discloses a manganese-lithium separating method used in ternary battery waste comprehensive recycling, and relates to a battery waste recycling method. The manganese-lithium separating method comprises the steps that a, waste ternary battery material powder is subjected to acid leaching, and impurity removal liquid is obtained; b, a cobaltous hydroxide and nickelous hydroxide mixtureis deposited through sodium hydroxide; c, the PH of washing liquid and filter liquid is adjusted through dilute sulphuric acid, and cobaltous sulfide and nickel sulfide are deposited; d, the PH of the filter liquid and the washing liquid is adjusted through sodium hydroxide, manganese ions are deposited, manganese hydroxide filter cakes, lithium containing filter liquid and washing liquid are obtained; e, after the lithium containing filter liquid and the washing liquid are subjected to sodium sulfate removal through evaporative crystallization, concentrated lithium liquid is obtained; and f,a saturated sodium carbonate solution is used for depositing lithium carbonate, and lithium carbonate filter cakes and lithium depositing mother liquid are obtained. The manganese-lithium separatingmethod solves the problems that in the prior art, manganese ions and lithium ions can be separated through extraction, the manganese ions are removed through a hydrolysis method, accordingly, the purposes of manganese-lithium separating and respective manganese and lithium ion recycling are achieved without extraction operation, the preparing technology is simplified, the technology process is shortened, material consumption and energy consumption are reduced, and the production cost is saved by 20% or above.