·AIM:To analyze the causes for the formation of shallow anterior chamber after traheculectomy in patients with glaucoma and its treatment.·METHODS:Studies on the causes of shallow anterior chamber formed after trabeculectomy and its treatment were carried out in 1556 cases 1556 eyes with glaucoma during recent 7 years.·RESULTS:Shallow anterior chamber had been occurred in 148 eyes(9.51%)of 1556 eyes after the operation.The excessive drainage through filtration track,the loosening of suture,the leakage of chamber fluid and malignant glaucoma were the main causes for the formation of shallow anterior chamber formed after the operation.Under the corresponding treatment of complications after the operation,the shallow chamber in 147 eyes recovered to normal.·CONCLUSION:The effective control of intraocular pressure before and after the operation,keeping suitable depth of anterior chamber during the operation,master-ing the degree of tightness of suture at incision,careful observation on changes of intraocular pressure and anteri-or chamber and treatment of complications on time are key points for the prevention of shallow anterior chamber occurred in patients with glaucoma after trabeculectomy.·