Abstract: The effects of different addition orders between sodium silicate, sodium fluoride, sodium sulfide, sodium hexametaphosphate and collector for the silicate minerals’ floatation were researched in the paper. When dode-canamine was used as collector, the addition and the orders of NaF had no effect to the silicateminerals’ floatation; the silicate minerals were inhibited by odium silicate, sodium sulfide, sodiumhexametaphosphate’s addition before collector; the actions were strengthened or depredated when the reagents were added after collector.