Poly(3,　4-ethylenedioxythiophene):poly(styrenesulfonate)　(PEDOT:PSS)　films　were　prepared　by　using　spray　coating　technique.　The　morphology,　transmittance　and　conductivity　of　the　film　were　studied　by　using　ethanol,　deionized　water,　methanol　and　isopropanol　to　dilute　the　origin　PEDOT:PSS,　respectively.　The　solvent-diluted　PEDOT:PSS　films　were　employed　to　fabricated　organic　solar　cells.　The　effect　of　solvents　dilution　on　the　solar　cells　performance　was　studied.　The　results　indicate　that　the　introduction　of　ethanol　can　effectively　inhibit　the　agglomeration　of　PEDOT:PSS　particles,　reduce　the　film　roughness,　and　improve　the　transmittance　and　conductivity　of　the　PEDOT:PSS　film.　The　organic　solar　cell　based　on　the　PEDOT:PSS　film　diluted　with　ethanol　exhibits　a　power　conversion　efficiency　of　2.66%,　which　is　higher　than　those　with　other　diluting　solvents.