In　order　to　solve　the　problem　of　the　hard　balance　of　the　accuracy　and　speed　in　motion　estimation　of　flotation　surface　bubbles,　a　fast　motion　estimation　algorithm　combined　of　bubble　tracking　and　phase　correlation　technique　was　proposed.　Firstly,　the　two　continuous　images　in　a　sequence　were　preprocessed　by　zooming　out　on　gray　value　minimum.　Then　the　high　gray　value　area　of　each　bubble　was　extracted　to　complete　the　bubble　tracking　based　on　image　segmentation　method.　Phase　correlation　was　finally　used　to　obtain　the　motion　vectors　of　the　bubbles.　Block　phase　correlation　method　was　further　employed　to　obtain　the　detailed　displacement　feature　for　each　block.　Simulation　results　verified　the　estimation　efficiency　and　accuracy　of　the　proposed　algorithm.　Experimental　results　on　a　lead　zinc　flotation　plant　showed　that　the　proposed　algorithm　can　obtain　real-time　motion　vectors,　and　the　detailed　motion　feature　of　each　block　can　be　obtained　by　the　block　phase　correlation　method.　The　bubbles　motion　data　of　each　flotation　cell　showed　the　following　characteristics.　The　bubble　displacement　motion　of　each　flotation　cell　is　in　a　certain　cycle.　The　displacement　motion　distribution　curve　and　the　turbulence　degree　distribution　curve　of　the　same　level　flotation　cell　are　the　similar,　and　maintaining　a　certain　degree　of　bubble　movement　turbulence　can　improve　the　grade　of　concentrate.　©　2016,　Editorial　Department　of　Journal　of　Sichuan　University　(Engineering　Science　Edition).　All　right　reserved.