Abstract: The influences of inorganic anion regulators on the flotation of kyanite,quartz and biotite by flotation experiments.The results show that laurylamine was used as collector,the addition and the orders of sodium fluoride had no effect to the quartz and biotite minerals floatation,but had active function on kyanite.The addition and the orders of sodium silicate had little effect to biotite mineral.The kyanite mineral was suppressed by sodium silicate,and the actions were strengthened when the reagents were added after collector.The addition of sodium hexametaphosphate had strong inhibition effect to the quartz and kyanite minerals floatation,but had weaker inhibiting effect on biotite.The addition of sodium sulfide no effect to the quartz and biotite minerals floatation,but had slight activate effect on kyanite mineral.The relationship between activation and inhibition mechanism of inorganic anion regulators were analyzed by solution chemistry.