Breakage　and　regrowth　of　flocs　has　been　studied　for　several　years,　however　little　attention　was　paid　to　the　regrowth　ability　of　broken　micro-flocs　which　are　mainly　formed　during　the　initial　flocculation　stage.　In　this　paper,　a　continuous　optical　monitoring　method　was　employed　to　investigate　the　kinetics　of　flocs　formation,　and　especially　more　evident　flocs　properties　(strength　and　recovery　factor)　were　also　explored.　The　results　showed　that　breakage　at　the　beginning　of　flocculation　stage　can　improve　flocs　regrowth　to　greater　sizes　when　the　coagulation　was　initially　dominated　by　charge　neutralization　at　a　predetermined　dosage.　Furthermore,　second　dose　of　different　coagulants　during　this　breakage　process　improved　kaolin　particles　removal　efficiency　to　varying　degrees.　Separately,　the　second　dose　of　Al-2(SO4)(3)　continuously　enlarged　the　floc　size　with　the　increasing　dosage,　contrarily　that　of　PACl　reduced　the　floc　size.　Based　on　the　analysis　of　flocs　properties,　this　phenomenon　can　be　well　explained　by　the　difference　between　coagulation　mechanisms　under　the　second　dose　of　Al-2(SO4)(3)　and　PACl　respectively:　newly　formed　hydroxides　of　Al-2(SO4)(3)　enhanced　broken　flocs　regrowth　to　larger　sizes　and　entrapped　more　particles　(lower　residual　turbidity)　by　sweep　flocculation;　that　of　PACl　formed　compact　flocs　due　to　stronger　electric　density　of　Al　hydroxides.　It　was　worth　noting　that　turbidity　removal　performance　was　even　better　when　the　overall　dosage　by　second　dose　only　counted　for　similar　to　70%　of　one-time　dose.　Importantly,　this　study　aimed　at　providing　a　feasible　economic　dose　strategy　for　the　real　coagulation-flocculation　application.