We　synthesized　new,　yellow-light　emitting,　and　hydrophilic　poly[(9,9-di-(2-ethylhexyl)-9H-fluorene-2,7-vinylene)-co-(1-methoxy-4-(2-ethylhe-xyloxy)-2,5-phenylenevinylene)]　conjugated　polymer　dots　capped　with　nonionic　surfactant　Triton　X-100　(PFV　CP-dots@TX),　immobilized　them　on　glassy　carbon　electrodes　and　studied　their　electrochemiluminescence　(ECL)　behaviors　and　mechanisms　in　aqueous　solutions.　The　ECL　activities　of　the　hydrophilic　CP-dots　were　investigated　by　applying　the　glassy　carbon　working　electrode　with　pulse　potential　between　anodic　and　cathodic　potentials　in　the　absence　of　coreactant,　with　sweeping　anodic　potential　in　the　presence　of　Tri-n-propylamine　(TPrA)　as　the　coreactant,　and　with　sweeping　cathodic　potential　in　the　presence　of　peroxydisulfate　(S2O82-)　as　the　coreactant.　Experimental　results　shows　that　PFV　CP-dots@TX　have　good　annihilation　ECL　activity,　anodic　ECL　activity　and　cathodic　ECL　activity.　All　of　the　three　types　of　ECL　reactions　emit　yellow　light　with　the　maximum　wavelength　of　573　nm,　which　is　the　same　as　the　fluorescence　emission　spectrum　of　PFV　CP-dots@TX　in　water.　The　energies　involved　in　the　ECL　reactions　were　analyzed　and　non-surface　state　ECL　mechanisms　were　discussed　and　proposed.　The　yellow　light-emitting,　hydrophilic　CP-dots　are　envisioned　to　be　a　new　type　of　ECL　luminophores　that　may　have　promising　applications　in　chemical　sensing,　biosensing　and　new　optoelectronic　devices.　(C)　2016　Elsevier　B.V.　All　rights　reserved.