Abstract: In order to evaluate the pros and cons of beneficiation technical indicators scientifically， effectively and conveniently，analyzes and researches common problems such as the drawbacks and limita⁃ tions of the existing beneficiation industry index evaluation methods.Through the derivation of mathematical formulas，the relevant influencing factors are found out，and the objective function that is fast，simple and applicable is established，and the beneficiation index of a lead-zinc ore is analyzed and evaluated by using the new objective function.The evaluation results show that: the new objective function can overcome the disadvantages of the non-uniform evaluation system caused by the fluctuation of beneficiation index caused by the fluctuation of raw ore properties，and at the same time avoid the disadvantages and limitations of the previous evaluation methods. The scientific，effective and convenient evaluation of beneficiation technical indicators is realized，which provides a basis for scientific evaluation of beneficiation index separation effi⁃ ciency，and also provides technical reference for relevant enterprises to evaluate beneficiation indexes.

Key words: mineral processing index, beneficiation efficiency, objective function, evaluation methods, lead-zinc ore