Forthepurposeofreducingthevolumetricshrinkageandvolumetricshrinkagevariation,theprocessininjectionmoldingofasphericplasticlenswassimulated,andseveralprocessparameterswhichincludeholdingpressure,melttemperature,moldtemperature,filltime,holdingpressuretimeandcoolingtimewereoptimizedbyusinganorthogonalexperimentaldesignmethod.Finally,theoptimumprocessparametersandtheinfluencedegreeofprocessparametersontheaveragevolumetricshrinkageandthevolumetricshrinkagevariationareobtained.