The　silicon　molybdbenum　yellow　method　for　spectrophotometry　determination　was　applied　to　quantitative　analyze　silicon　ion　in　ASP-flooding　produced　water.　The　effects　of　NaOH,　polymer　(HPAM)　and　sodium　dodecylbenzene　sulfonate　(LAS)　on　quantitative　analysis　of　silicon　ions　were　discussed.　The　results　showed　that　NaOH　(0-7200　mg/L)　and　LAS　(0-2400　mg/L)　had　almost　no　effect　on　the　absorbance.　Hydrochloric　acid　could　be　used　to　eliminate　the　influence　of　NaOH　with　high　concentration　(＞　7200　mg/L).　When　the　pH　value　was　1.2　and　the　dosage　of　HPAM　(M=35　million)　was　between　0　and　80　mg/L,　solution　absorbance　increased　with　increasing　concentration　of　HPAM.　The　interference　of　polymer　on　the　measuring　of　silicon　ion　could　not　be　eliminated　by　adding　1　mL　acetone,　but　it　could　be　eliminated　by　diluting　with　distilled　water.　The　interference　of　polymer　with　low　molecular　weight　(M=3　million)　and　low　concentration　(0-40　mg/L)　was　weak.　The　method　suggested　was　simple,　rapid　and　of　satisfactory　precision　and　accuracy.　The　standard　curve　of　linear　regression　equation　was:　A=0.0145c,　and　the　correlation　coefficient　R2　was　0.9996.　The　linearity　of　absorbance　concentration　relationship　maintained　in　the　range　of　silicon　ion　concentration　0-20　mg/L.　The　accuracy　of　the　method　was　less　than　2%.　The　measured　value　of　the　relative　standard　deviation　was　only　1.39%,　which　indicated　the　repeatability　of　this　method　was　good.