Objective: To probe the value of the saccharification albumin and saccharification hemoglobin in diagnosing pregnancy diabetes. Methods: To measure serum carry on empty stomach blood sugar, oral glucose 50g screen, GSP and HbAlc for contrasting 50 cases in contrast group, normal gestation 50 of group and pregnancy diabetes 36 of group. Results: The results of FPG, GSP, glucose screen and HbAlc were significantly higher than those in normal gestation group obviously (P<0.05). The sensitivity, peculiar, dependability and predicting positively of four examination for diagnosing pregnancy diabetes were 88.9%, 98%, 94.1%, 96.9%. The most ideal one is GSP. sensitivity, peculiar, dependability and predicting positively of HbAlc were 80.6%, 96%, 89.5%, 93.5% respectively, which were higher than the FPG and glucose screen. Conculsion: GSP and HbAlc method of inspection are fast, simple, practical, the amount of blood fetched lacks, it is difficult to influence by other factors, can diagnose the index as GDM, among them it is first-selected with GSP.