Abstract: In order to indentify the influence law and action mechanism of magnetization treatment on flotation effect,taking hematite and quartz as the main research object,the effects of magnetization treatment process parameters such as magnetic induction intensity,magnetization time,magnetic field position on the flotation indexes were investigated. Meanwhile,the action mechanism of reagent magnetization treatment was revealed from the effect of magnetization treatment on reagents and minerals by using surface tension test,conductivity test,Zeta potential test and other test methods. Under the conditions of magnetic induction strength of 150 mT,magnetization time of 6 min,and No. 1 magnetic field position (high magnetic field gradient),the flotation reagent was magnetized. The recovery rate of hematite was increased to 78. 27%,increased by 23. 62 percentage points compared with unmagnetized reagent. While the recovery rate of quartz almost unchanged and maintained lower level. The test results of the artificial mixed ore showed that with the similar TFe grade,the TFe recovery rate increased by 6. 75 percentage points when the flotation reagent was magnetized. The concentration of sodium oleate ions in the solution increases after magnetization treatment,and the adsorption of oleate ions on the surface of hematite is enhanced,which is conducive to the flotation of hematite. The research results have certain significance for the establishment of magnetization flotation theory system,and can provide reference for the application of magnetization treatment in hematite flotation.