Inthispaper,weproposedadiscreteopiniontransmissionmodelthatextendsSIRbasedontheclassicalSIRepidemicmodel.Thispaperstudiedthediscreteopiniontransmissivedynamicsintermsofpositiveandnegativeopinionspace,anddeduceditsmathematicalanalysisprocessindetailandcarriedoutthesimulationexperimentanalysis.Theexperimentalresultsshowthatthemodeliscorrectandeffective.