Abstract: Objective: To explore the correlation between the blood glucose level and the prognosis.Methods: Seventy-five patients with stress hyperglycemia were divided into three groups according to their control of the blood glucose level.The blood glucose level in Group A was well controlled,Group B generally controlled and Group C demonstrated bad insulin control.The infection,multiple organ dysfunction syndrome and death rate were the judging standard between the groups;and the results were statistically analyzed.Results: The prognosis of group A was better than that of group B and group C(P<0.017 to P<0.010).There was no statistical significance between group B and group C(P>0.05).Conclusions: Control of excitability hyperglycemia level can ameliorate the patients' prognosis.