AIM:To analyze the correlative factors of the corneal edema after cataract phacoemulsification. METHODS:The relations between the corneal edema and age,rigidity of lens nucleus,glaucoma, diabetes in 532 cases (564 eyes) after cataract phacoemulsification were studied. RESULTS:There were 118 eyes of corneal edema in 564 eyes, the rate of corneal edema was 20.9%. The incidence of patients older than 70 was 24.0%,Ⅳ level of lens nucleus was 36.9%,Ⅴ level of lens nucleus was 100%, patients with operation for glaucoma was 68.1%, and patients with diabetes was 48.6%. CONCLUSION:Corneal edema after cataract phacoemulsification surgery has parallel correlation with age and rigidity of lens nucleus. Its easy to occur in patients with diabetes or operation for glaucoma.While, patients with no ocular operation, diabetes mellitus have a lower rate of corneal edema and lighter reaction.