The invention belongs to the field of detection, and particularly relates to a mass method complexometric titration nickel-cobalt-manganese content detection method. The method comprises the followingsteps: 1, digesting and diluting a battery material containing nickel, cobalt and manganese to a set mass constant volume, performing titrating by using an EDTA standard solution, and calculating thetotal content of nickel, cobalt and manganese according to the amount of the consumed EDTA standard titration solution; 2, dissolving the battery material containing nickel, cobalt and manganese by adopting acid, and detecting the proportion of nickel, cobalt and manganese through an inductively coupled plasma emission spectrum ICP; 3, calculating the contents of nickel, cobalt and manganese according to the result of the step 1 and the result of the step 2. The method has the advantages that multiple tiny influence factors such as actual operation constant volume, pipetting volume and measuring tool specification errors, environment temperature and volume relation factors, measuring tool solution wall sticking residues and influences, tiny variation factors of volume caused by degradation and co-dissolution of digestion acid concentration and the like are eliminated; meanwhile, the accurate total amount and weight of the nickel-cobalt-manganese hydroxide are accurately detected.